{"disclaimer":"This is my working reading of Minnesota Rule chapter 5223. I keep checking it against the official rule text and published decisions. If a category, percent, or combination looks wrong, email hello@mncompbuddy.com and say what you found. A mismatch is a reason to look again, not a reason to treat this tool or a doctor rating as automatically correct.","manifest":{"part":"5223.0510","title":"Knee and lower leg permanency rule 5223.0510","status":"published","publishedOn":"2026-08-18","auditDocument":"docs/audits/ppd-rule-5223-0510-attack.md"},"graph":{"part":"5223.0510","slug":"knee","title":"Knee and lower leg","summary":"Rule 5223.0510 rates the knee and lower leg under exclusive categories (subpart 2: plateau and distal femur fracture ladders, patellar surgeries, collateral ligament laxity, painful organic syndrome, nerve entrapment, tibial nonunion), combinable categories (subpart 3: patellectomy, meniscectomy, arthroplasty, cruciate laxity, angular deformity, osteotomy), and loss of measured motion (subpart 4). Combinable categories also take a subpart 4 rating; distinct impairing conditions combine under 5223.0300, subpart 3, item E; and the whole part is capped at 34 percent, the amputation value for the leg at the knee.","generalAuthority":{"part":"5223.0510","path":"1","quote":"Subpart 1. General. For permanent partial impairment to the knee and lower leg, disability of the whole body is as provided in subparts 2 to 4. The percent of whole body disability under this part may not exceed the percent of whole body disability for amputation of the leg at the knee under part 5223.0550. Each mutually exclusive impairing condition must be rated separately and the ratings must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is represented by a category designated as exclusive under subpart 2, it must be rated by that category only and that rating may not be combined with a rating under any other category of this part for that impairing condition. If an impairing condition is represented by a category designated as combinable under subpart 3, it must be rated under that category and under the appropriate categories describing loss of function under subpart 4. The ratings obtained must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is not represented by a category designated either exclusive or combinable, it must be rated only under the appropriate categories describing loss of function under subpart 4.","textHash":"3bbb7c8f","url":"https://www.revisor.mn.gov/rules/5223.0510/"},"facts":[{"id":"medical.tibialPlateauFractureType","label":"Tibial plateau fracture, by displacement and treatment","type":"enum","options":[{"value":"none","label":"No plateau fracture"},{"value":"undisplaced","label":"Undisplaced"},{"value":"depressed-elevated-one","label":"Depressed bone surgically elevated, medial or lateral plateau (one)"},{"value":"depressed-elevated-both","label":"Depressed bone surgically elevated, both medial and lateral plateaus"},{"value":"depressed-not-elevated","label":"Depressed but never surgically elevated"}],"evidence":["x-ray or CT report","operative report describing elevation of depressed bone"]},{"id":"medical.plateauCartilageExcised","label":"Semilunar cartilage (meniscus) excised, partially or completely, in treating the plateau fracture","type":"boolean","evidence":["operative report"]},{"id":"medical.distalFemurFracturePattern","label":"Distal femur fracture pattern at the knee","type":"enum","options":[{"value":"none","label":"No distal femur fracture"},{"value":"supracondylar","label":"Supracondylar"},{"value":"intercondylar","label":"Intercondylar"},{"value":"unicondylar","label":"Unicondylar"},{"value":"bicondylar","label":"Bicondylar"}],"evidence":["x-ray or CT report","operative report"]},{"id":"medical.distalFemurFractureDisplaced","label":"The distal femur fracture is displaced","type":"boolean","evidence":["x-ray or CT report"]},{"id":"surgical.patellarShaving","label":"Patellar shaving performed","type":"boolean","evidence":["operative report"]},{"id":"surgical.patellarDislocationRepair","label":"Surgical repair of a patellar dislocation performed","type":"boolean","evidence":["operative report"]},{"id":"surgical.lateralRetinacularRelease","label":"Lateral retinacular release performed","type":"boolean","evidence":["operative report"]},{"id":"surgical.patellectomy","label":"Partial or total patellectomy performed (bone removed; fixation alone does not qualify)","type":"boolean","evidence":["operative report stating bone was excised"]},{"id":"medical.collateralLaxity","label":"Residual laxity from a ruptured collateral ligament, repaired or unrepaired","type":"enum","options":[{"value":"none","label":"No collateral rupture, or no residual laxity"},{"value":"mild","label":"Mild laxity"},{"value":"moderate","label":"Moderate laxity"}],"evidence":["exam notes documenting valgus/varus stress laxity","MRI or operative report of the rupture"]},{"id":"medical.painfulOrganicSyndrome","label":"Painful organic syndrome (as defined at 5223.0310, subp. 40), substantiated by consistent, reproducible clinical or imaging findings, with persistent limitation of active motion or deviation of gait","type":"boolean","evidence":["exam notes","imaging reports"]},{"id":"medical.passiveRomLimited","label":"Passive range of motion of the knee is limited","type":"boolean","evidence":["exam notes with passive range of motion measurements"]},{"id":"medical.peronealEntrapment","label":"Peroneal nerve entrapment at the knee or in the lower leg","type":"enum","options":[{"value":"none","label":"No entrapment syndrome claimed"},{"value":"resolved","label":"Resolved with treatment"},{"value":"persistent-no-emg","label":"Pain and paresthesia persist or recur despite treatment, not substantiated by electrodiagnostic testing"},{"value":"persistent-emg","label":"Pain and paresthesia persist despite treatment, substantiated by persistent findings on electrodiagnostic testing"},{"value":"motor-sensory-loss","label":"Objectively demonstrable motor or sensory loss (rated under the nerve tables, 5223.0420 and 5223.0430)"}],"evidence":["EMG/nerve conduction study","exam notes"]},{"id":"medical.tibialEntrapment","label":"Tibial nerve entrapment at the knee or in the lower leg","type":"enum","options":[{"value":"none","label":"No entrapment syndrome claimed"},{"value":"resolved","label":"Resolved with treatment"},{"value":"persistent-no-emg","label":"Pain and paresthesia persist or recur despite treatment, not substantiated by electrodiagnostic testing"},{"value":"persistent-emg","label":"Pain and paresthesia persist despite treatment, substantiated by persistent findings on electrodiagnostic testing"},{"value":"motor-sensory-loss","label":"Objectively demonstrable motor or sensory loss (rated under the nerve tables, 5223.0420 and 5223.0430)"}],"evidence":["EMG/nerve conduction study","exam notes"]},{"id":"medical.tibiaNonunionOrthosis","label":"Nonunion of a tibia fracture requiring a nonweight-bearing orthosis for ambulation","type":"boolean","evidence":["follow-up imaging describing nonunion","orthotic prescription"]},{"id":"medical.meniscectomyExtent","label":"Meniscectomy (excision of semilunar cartilage) in this knee, by extent","type":"enum","options":[{"value":"none","label":"No cartilage removed"},{"value":"one-lt50","label":"Up to 50 percent of one cartilage removed"},{"value":"one-gt50","label":"More than 50 percent of one cartilage removed"},{"value":"both-lt50","label":"Up to 50 percent of both cartilages removed"},{"value":"both-gt50","label":"More than 50 percent of both cartilages removed"},{"value":"mixed","label":"Up to 50 percent of one and more than 50 percent of the other removed"}],"evidence":["operative report stating how much of each meniscus was excised"]},{"id":"surgical.meniscusRepairOnly","label":"Meniscus suture repair with no cartilage removed","type":"boolean","evidence":["operative report"]},{"id":"surgical.arthroplasty","label":"Condylar knee arthroplasty performed","type":"enum","options":[{"value":"none","label":"No condylar arthroplasty"},{"value":"unicondylar","label":"Unicondylar (one compartment)"},{"value":"total","label":"Total condylar (medial and lateral compartments)"}],"evidence":["operative report"]},{"id":"surgical.patellaReplacement","label":"Patella (kneecap) component replaced, whether as patellar resurfacing during a knee replacement or as an isolated patellar replacement","type":"boolean","evidence":["operative report"]},{"id":"medical.aclLaxity","label":"Anterior cruciate ligament laxity","type":"enum","options":[{"value":"none","label":"None"},{"value":"mild","label":"Mild: positive drawer sign, no pivot shift"},{"value":"severe","label":"Severe: positive drawer sign with pivot shift"}],"evidence":["exam notes with drawer and pivot-shift findings"]},{"id":"medical.pclLaxity","label":"Posterior cruciate ligament laxity","type":"boolean","evidence":["exam notes with posterior drawer findings"]},{"id":"medical.varusDegrees","label":"Posttraumatic varus deformity, in degrees (0 means none)","type":"number","unit":"degrees","evidence":["standing alignment x-ray report"]},{"id":"medical.valgusDegrees","label":"Posttraumatic valgus deformity, in degrees (0 means none)","type":"number","unit":"degrees","evidence":["standing alignment x-ray report"]},{"id":"surgical.osteotomy","label":"Proximal tibial or distal femoral osteotomy performed","type":"boolean","evidence":["operative report"]},{"id":"medical.unratableFractureOrDislocation","label":"Fracture or dislocation involving the femur, tibia, or fibula (or, for dates of injury on or after August 9, 2010, the patella) not otherwise ratable under this part, 5223.0500, or 5223.0520","type":"boolean","evidence":["x-ray or CT report"]},{"id":"medical.unlistedConditionMotionLossOnly","label":"A knee condition no category of subparts 2 or 3 represents, rated only on measured loss of motion under subpart 4","type":"boolean","evidence":["diagnosis records","range of motion measurements"]}],"nodes":[{"kind":"discrete","endpointId":"knee-tibial-plateau-undisplaced","role":"base","exclusiveFamily":"knee-tibial-plateau","when":{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"undisplaced"}},{"kind":"discrete","endpointId":"knee-tibial-plateau-one-intact","role":"base","exclusiveFamily":"knee-tibial-plateau","when":{"all":[{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"depressed-elevated-one"},{"fact":"medical.plateauCartilageExcised","op":"eq","value":false}]}},{"kind":"discrete","endpointId":"knee-tibial-plateau-one-excised","role":"base","exclusiveFamily":"knee-tibial-plateau","when":{"all":[{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"depressed-elevated-one"},{"fact":"medical.plateauCartilageExcised","op":"eq","value":true}]}},{"kind":"discrete","endpointId":"knee-tibial-plateau-both-intact","role":"base","exclusiveFamily":"knee-tibial-plateau","when":{"all":[{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"depressed-elevated-both"},{"fact":"medical.plateauCartilageExcised","op":"eq","value":false}]}},{"kind":"discrete","endpointId":"knee-tibial-plateau-both-excised","role":"base","exclusiveFamily":"knee-tibial-plateau","when":{"all":[{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"depressed-elevated-both"},{"fact":"medical.plateauCartilageExcised","op":"eq","value":true}]}},{"kind":"discrete","endpointId":"knee-distal-femur-fracture-undisplaced","role":"base","exclusiveFamily":"knee-distal-femur","when":{"all":[{"fact":"medical.distalFemurFractureDisplaced","op":"eq","value":false},{"fact":"medical.distalFemurFracturePattern","op":"in","value":["supracondylar","intercondylar"]}]}},{"kind":"discrete","endpointId":"knee-distal-femur-fracture-undisplaced-bicondylar","role":"base","exclusiveFamily":"knee-distal-femur","when":{"all":[{"fact":"medical.distalFemurFractureDisplaced","op":"eq","value":false},{"fact":"medical.distalFemurFracturePattern","op":"eq","value":"bicondylar"}]}},{"kind":"discrete","endpointId":"knee-distal-femur-fracture-displaced-supracondylar","role":"base","exclusiveFamily":"knee-distal-femur","when":{"all":[{"fact":"medical.distalFemurFractureDisplaced","op":"eq","value":true},{"fact":"medical.distalFemurFracturePattern","op":"eq","value":"supracondylar"}]}},{"kind":"discrete","endpointId":"knee-distal-femur-fracture-displaced-unicondylar","role":"base","exclusiveFamily":"knee-distal-femur","when":{"all":[{"fact":"medical.distalFemurFractureDisplaced","op":"eq","value":true},{"fact":"medical.distalFemurFracturePattern","op":"eq","value":"unicondylar"}]}},{"kind":"discrete","endpointId":"knee-distal-femur-fracture-displaced-bicondylar","role":"base","exclusiveFamily":"knee-distal-femur","when":{"all":[{"fact":"medical.distalFemurFractureDisplaced","op":"eq","value":true},{"fact":"medical.distalFemurFracturePattern","op":"eq","value":"bicondylar"}]}},{"kind":"discrete","endpointId":"knee-patellar-shaving","role":"base","exclusiveFamily":"knee-patella","when":{"fact":"surgical.patellarShaving","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-patellar-dislocation-repair","role":"base","exclusiveFamily":"knee-patella","when":{"fact":"surgical.patellarDislocationRepair","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-lateral-retinacular-release","role":"base","exclusiveFamily":"knee-patella","when":{"fact":"surgical.lateralRetinacularRelease","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-patella-fracture","role":"base","exclusiveFamily":"knee-patella","when":{"fact":"surgical.patellectomy","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-mcl-lcl","role":"base","exclusiveFamily":"knee-collateral","when":{"fact":"medical.collateralLaxity","op":"eq","value":"mild"}},{"kind":"discrete","endpointId":"knee-mcl-lcl-moderate","role":"base","exclusiveFamily":"knee-collateral","when":{"fact":"medical.collateralLaxity","op":"eq","value":"moderate"}},{"kind":"discrete","endpointId":"knee-painful-organic-syndrome","role":"base","exclusiveFamily":"knee-pain-syndrome","when":{"all":[{"fact":"medical.painfulOrganicSyndrome","op":"eq","value":true},{"fact":"medical.passiveRomLimited","op":"eq","value":false}]}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-peroneal-resolved","role":"base","exclusiveFamily":"knee-entrapment-peroneal","when":{"fact":"medical.peronealEntrapment","op":"eq","value":"resolved"}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-peroneal-symptoms-no-emg","role":"base","exclusiveFamily":"knee-entrapment-peroneal","when":{"fact":"medical.peronealEntrapment","op":"eq","value":"persistent-no-emg"}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-peroneal-persistent","role":"base","exclusiveFamily":"knee-entrapment-peroneal","when":{"fact":"medical.peronealEntrapment","op":"eq","value":"persistent-emg"}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-tibial-resolved","role":"base","exclusiveFamily":"knee-entrapment-tibial","when":{"fact":"medical.tibialEntrapment","op":"eq","value":"resolved"}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-tibial-symptoms-no-emg","role":"base","exclusiveFamily":"knee-entrapment-tibial","when":{"fact":"medical.tibialEntrapment","op":"eq","value":"persistent-no-emg"}},{"kind":"discrete","endpointId":"knee-nerve-entrapment-tibial-persistent","role":"base","exclusiveFamily":"knee-entrapment-tibial","when":{"fact":"medical.tibialEntrapment","op":"eq","value":"persistent-emg"}},{"kind":"discrete","endpointId":"knee-nonunion-tibia","role":"base","exclusiveFamily":"knee-tibia-nonunion","when":{"fact":"medical.tibiaNonunionOrthosis","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-meniscectomy-partial","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"medical.meniscectomyExtent","op":"eq","value":"one-lt50"}},{"kind":"discrete","endpointId":"knee-meniscectomy-subtotal","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"medical.meniscectomyExtent","op":"eq","value":"one-gt50"}},{"kind":"discrete","endpointId":"knee-meniscectomy-both-lt50","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"medical.meniscectomyExtent","op":"eq","value":"both-lt50"}},{"kind":"discrete","endpointId":"knee-meniscectomy-both-gt50","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"medical.meniscectomyExtent","op":"eq","value":"both-gt50"}},{"kind":"discrete","endpointId":"knee-meniscectomy-mixed-bilateral","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"medical.meniscectomyExtent","op":"eq","value":"mixed"}},{"kind":"discrete","endpointId":"knee-meniscus-repair","role":"base","exclusiveFamily":"knee-meniscus","when":{"fact":"surgical.meniscusRepairOnly","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-unicondylar","role":"base","exclusiveFamily":"knee-arthroplasty","when":{"fact":"surgical.arthroplasty","op":"eq","value":"unicondylar"}},{"kind":"discrete","endpointId":"knee-tkr","role":"base","exclusiveFamily":"knee-arthroplasty","when":{"fact":"surgical.arthroplasty","op":"eq","value":"total"}},{"kind":"discrete","endpointId":"knee-patella-replacement","role":"base","exclusiveFamily":"knee-arthroplasty-patella","when":{"fact":"surgical.patellaReplacement","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-acl-mild","role":"base","exclusiveFamily":"knee-acl","when":{"fact":"medical.aclLaxity","op":"eq","value":"mild"}},{"kind":"discrete","endpointId":"knee-acl-severe","role":"base","exclusiveFamily":"knee-acl","when":{"fact":"medical.aclLaxity","op":"eq","value":"severe"}},{"kind":"discrete","endpointId":"knee-pcl","role":"base","exclusiveFamily":"knee-pcl","when":{"fact":"medical.pclLaxity","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-varus-deformity-to5","role":"base","exclusiveFamily":"knee-varus","when":{"all":[{"fact":"medical.varusDegrees","op":"gte","value":1},{"fact":"medical.varusDegrees","op":"lte","value":5}]}},{"kind":"discrete","endpointId":"knee-varus-deformity-6to15","role":"base","exclusiveFamily":"knee-varus","when":{"all":[{"fact":"medical.varusDegrees","op":"gte","value":6},{"fact":"medical.varusDegrees","op":"lte","value":15}]}},{"kind":"discrete","endpointId":"knee-varus-deformity-gt15","role":"base","exclusiveFamily":"knee-varus","when":{"fact":"medical.varusDegrees","op":"gt","value":15}},{"kind":"discrete","endpointId":"knee-valgus-deformity-to10","role":"base","exclusiveFamily":"knee-valgus","when":{"all":[{"fact":"medical.valgusDegrees","op":"gte","value":1},{"fact":"medical.valgusDegrees","op":"lte","value":10}]}},{"kind":"discrete","endpointId":"knee-valgus-deformity-11to20","role":"base","exclusiveFamily":"knee-valgus","when":{"all":[{"fact":"medical.valgusDegrees","op":"gte","value":11},{"fact":"medical.valgusDegrees","op":"lte","value":20}]}},{"kind":"discrete","endpointId":"knee-valgus-deformity-gt20","role":"base","exclusiveFamily":"knee-valgus","when":{"fact":"medical.valgusDegrees","op":"gt","value":20}},{"kind":"discrete","endpointId":"knee-osteotomy","role":"base","exclusiveFamily":"knee-osteotomy","when":{"fact":"surgical.osteotomy","op":"eq","value":true}},{"kind":"discrete","endpointId":"knee-other-0","role":"base","exclusiveFamily":"knee-fracture-other","when":{"any":[{"fact":"medical.unratableFractureOrDislocation","op":"eq","value":true},{"fact":"medical.tibialPlateauFractureType","op":"eq","value":"depressed-not-elevated"}]}},{"kind":"discrete","endpointId":"knee-unlisted-rom","role":"base","exclusiveFamily":"knee-unlisted-motion-loss","when":{"any":[{"fact":"medical.unlistedConditionMotionLossOnly","op":"eq","value":true},{"all":[{"fact":"medical.painfulOrganicSyndrome","op":"eq","value":true},{"fact":"medical.passiveRomLimited","op":"eq","value":true}]}]}}],"extraEdges":[{"kind":"capBy","from":"5223.0510","to":"5223.0550","note":"Subp. 1: the whole-part total may not exceed the whole-body percent for amputation of the leg at the knee, 34 percent (R. 5223.0550, subp. 1.E)."},{"kind":"crossReference","from":"5223.0510","to":"5223.0420","note":"Subp. 2.H(4): entrapment with objectively demonstrable motor loss rates under the motor nerve table of 5223.0420 (common and deep peroneal, superficial peroneal, tibial rows)."},{"kind":"crossReference","from":"5223.0510","to":"5223.0430","note":"Subp. 2.H(4): entrapment with objectively demonstrable sensory loss rates under the sensory nerve table of 5223.0430."},{"kind":"crossReference","from":"5223.0510","to":"5223.0500","note":"Subp. 3.I excludes fractures ratable under the hip part; a femur fracture is rated where the rule that most closely represents it lives."},{"kind":"crossReference","from":"5223.0510","to":"5223.0520","note":"Subp. 3.I excludes fractures ratable under the ankle part; a distal tibia or fibula fracture may belong there."}],"examples":[{"id":"knee-tka","label":"Total knee arthroplasty, category alone (audit S1 before the motion rating)","dateOfInjury":"2024-01-01","facts":{"surgical.arthroplasty":"total"},"expectedTotalPercent":8},{"id":"knee-tka-patella","label":"Total condylar arthroplasty (8) with patella replacement (7), combined per Pechacek v. HealthEast","dateOfInjury":"2024-01-01","facts":{"surgical.arthroplasty":"total","surgical.patellaReplacement":true},"expectedTotalPercent":14.44},{"id":"knee-distal-femur-bicondylar","label":"Displaced bicondylar distal femur fracture, the audit F-01 headline path","dateOfInjury":"2024-01-01","facts":{"medical.distalFemurFracturePattern":"bicondylar","medical.distalFemurFractureDisplaced":true},"expectedTotalPercent":10},{"id":"knee-nonunion-plus-meniscectomy","label":"Tibial nonunion (18) combined with a subtotal meniscectomy (3), distinct conditions (audit S5 without motion)","dateOfInjury":"2024-01-01","facts":{"medical.tibiaNonunionOrthosis":true,"medical.meniscectomyExtent":"one-gt50","surgical.meniscusRepairOnly":false},"expectedTotalPercent":20.46},{"id":"knee-mixed-meniscectomy-2010","label":"Mixed bilateral-cartilage meniscectomy on the first day the category exists (audit S12b)","dateOfInjury":"2010-08-09","facts":{"medical.meniscectomyExtent":"mixed"},"expectedTotalPercent":5}],"faq":[{"question":"Does a meniscus repair get the meniscectomy percentage?","answer":"No. Subpart 3.B pays for cartilage removed; a suture repair removes none. A symptomatic repaired meniscus is rated only on measured loss of motion under subpart 4."},{"question":"What does a total knee replacement rate?","answer":"Eight percent under subpart 3.C(2), plus the measured loss of motion under subpart 4, combined. If the patella was also replaced or resurfaced, subpart 3.C(3) adds seven percent as a separate rating: in Pechacek v. HealthEast, No. WC11-5232 (W.C.C.A. Aug. 25, 2011), the court affirmed both ratings combined to 14.44 percent, reasoning that the total condylar categories cover two compartments and the patella is the third."},{"question":"What if the knee was fractured and the kneecap fixed with hardware but no bone removed?","answer":"Subpart 3.A pays four percent only for partial or total patellectomy, removal of bone. A patella fracture treated with fixation alone rates zero percent under subpart 3.I (for dates of injury on or after August 9, 2010) plus the measured loss of motion."},{"question":"How high can a knee rating go?","answer":"Subpart 1 caps the whole part at the amputation value for the leg at the knee: 34 percent (R. 5223.0550, subp. 1.E). Categories and motion ratings that combine past that number are reduced to it."},{"question":"What about nerve damage at the knee?","answer":"Entrapment of the tibial or peroneal nerve rates zero to two percent on the subpart 2.H ladder. Once there is objectively demonstrable motor or sensory loss, the rating moves to the nerve tables of 5223.0420 and 5223.0430, where a complete common peroneal motor loss alone is 14 percent."},{"question":"The rule lists no category for my fracture pattern. What happens?","answer":"Some cells are genuinely silent: an undisplaced unicondylar distal femur fracture and a displaced intercondylar fracture fit no subpart 2.B clause. Those fall to subpart 3.I at zero percent plus the measured loss of motion, or rate by analogy under 5223.0300, subpart 3, item A. This tool reports no match rather than guessing."}],"notes":["Subpart 4 (loss of function) is delegated to the ROM module: a two-dimensional grid of extension and flexion limits paying up to 36 percent, plus four ankylosis positions, audited 24 of 24 clauses correct.","Bilateral meniscectomy: subp. 3.B directs each knee rated separately and the ratings combined. This graph rates one knee per evaluation; a second knee is a second evaluation whose result combines under 5223.0300, subp. 3.E.","The patellar categories (shaving, dislocation repair, retinacular release, patellectomy) describe one impairing condition; only the one that most closely represents the condition rates.","Patella replacement (subp. 3.C(3)) combines with a condylar arthroplasty rating rather than merging into it: Pechacek v. HealthEast, No. WC11-5232 (W.C.C.A. Aug. 25, 2011), affirmed 8 plus 7 combined to 14.44 percent for a total knee arthroplasty with patellar resurfacing."],"schemaVersion":"1.0.0","snapshotRetrievedOn":"2026-08-02","authorityByEndpoint":{"knee-tibial-plateau-undisplaced":[{"part":"5223.0510","path":"2.A.1","quote":"(1) undisplaced, two percent;","textHash":"69232a85","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-tibial-plateau-one-intact":[{"part":"5223.0510","path":"2.A.2.a","quote":"(a) semilunar cartilage intact, seven percent;","textHash":"e069d2cd","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-tibial-plateau-one-excised":[{"part":"5223.0510","path":"2.A.2.b","quote":"(b) semilunar cartilage excised, partially or completely, nine percent;","textHash":"a73be1b4","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-tibial-plateau-both-intact":[{"part":"5223.0510","path":"2.A.3.a","quote":"(a) both semilunar cartilages intact, nine percent;","textHash":"ec1d2a12","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-tibial-plateau-both-excised":[{"part":"5223.0510","path":"2.A.3.b","quote":"(b) one or both semilunar cartilages excised partially or completely, 11 percent.","textHash":"416f02d4","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-distal-femur-fracture-undisplaced":[{"part":"5223.0510","path":"2.B.1","quote":"(1) undisplaced supracondylar or undisplaced intercondylar fracture, two percent;","textHash":"533a34af","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-distal-femur-fracture-undisplaced-bicondylar":[{"part":"5223.0510","path":"2.B.2","quote":"(2) undisplaced bicondylar fracture, five percent;","textHash":"baca2e7d","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-distal-femur-fracture-displaced-supracondylar":[{"part":"5223.0510","path":"2.B.3","quote":"(3) displaced supracondylar fracture, four percent;","textHash":"52525d41","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-distal-femur-fracture-displaced-unicondylar":[{"part":"5223.0510","path":"2.B.4","quote":"(4) displaced unicondylar fracture, six percent;","textHash":"646028eb","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-distal-femur-fracture-displaced-bicondylar":[{"part":"5223.0510","path":"2.B.5","quote":"(5) displaced bicondylar fracture, ten percent.","textHash":"d1353097","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-patellar-shaving":[{"part":"5223.0510","path":"2.C","quote":"C. Patellar shaving, one percent.","textHash":"17ef2ef2","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-patellar-dislocation-repair":[{"part":"5223.0510","path":"2.E","quote":"E. Repair patellar dislocation, five percent.","textHash":"59309e2a","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-lateral-retinacular-release":[{"part":"5223.0510","path":"2.F","quote":"F. Lateral retinacular release, one percent.","textHash":"302c9b10","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-patella-fracture":[{"part":"5223.0510","path":"3.A","quote":"A. Partial or total patellectomy, four percent.","textHash":"c69c22be","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-mcl-lcl":[{"part":"5223.0510","path":"2.D.1","quote":"(1) mild laxity, two percent;","textHash":"c93acab8","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-mcl-lcl-moderate":[{"part":"5223.0510","path":"2.D.2","quote":"(2) moderate laxity, four percent.","textHash":"46d0bc5f","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-painful-organic-syndrome":[{"part":"5223.0510","path":"2.G","quote":"G. Painful organic syndrome, as defined in part 5223.0310, subpart 40, not elsewhere specified and substantiated by appropriate, consistent, and reproducible clinical or medical imaging findings which results in persistent limitation of active range of motion or persistent deviation of gait but no limitation of passive range of motion, zero percent.","textHash":"4b6e1730","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-peroneal-resolved":[{"part":"5223.0510","path":"2.H.1","quote":"(1) resolved with treatment, zero percent;","textHash":"30c38a0f","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-peroneal-symptoms-no-emg":[{"part":"5223.0510","path":"2.H.2","quote":"(2) pain and paresthesia recurring or persisting despite treatment, but not substantiated by persistent findings on electrodiagnostic testing, zero percent;","textHash":"e043a58d","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-peroneal-persistent":[{"part":"5223.0510","path":"2.H.3","quote":"(3) pain and paresthesia persisting despite treatment, or recurring and persisting despite treatment and substantiated by persistent findings on electrodiagnostic testing, two percent;","textHash":"fc38b176","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-tibial-resolved":[{"part":"5223.0510","path":"2.H.1","quote":"(1) resolved with treatment, zero percent;","textHash":"30c38a0f","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-tibial-symptoms-no-emg":[{"part":"5223.0510","path":"2.H.2","quote":"(2) pain and paresthesia recurring or persisting despite treatment, but not substantiated by persistent findings on electrodiagnostic testing, zero percent;","textHash":"e043a58d","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nerve-entrapment-tibial-persistent":[{"part":"5223.0510","path":"2.H.3","quote":"(3) pain and paresthesia persisting despite treatment, or recurring and persisting despite treatment and substantiated by persistent findings on electrodiagnostic testing, two percent;","textHash":"fc38b176","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-nonunion-tibia":[{"part":"5223.0510","path":"2.I","quote":"I. Nonunion of tibia fracture requiring nonweight bearing orthosis for ambulation, 18 percent.","textHash":"5527bccd","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscectomy-partial":[{"part":"5223.0510","path":"3.B.1","quote":"(1) up to 50 percent of a cartilage removed, two percent;","textHash":"8cc7ecc7","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscectomy-subtotal":[{"part":"5223.0510","path":"3.B.2","quote":"(2) more than 50 percent of a cartilage removed, three percent;","textHash":"806f4eb0","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscectomy-both-lt50":[{"part":"5223.0510","path":"3.B.3","quote":"(3) up to 50 percent of both cartilages removed, four percent;","textHash":"c03a2fa4","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscectomy-both-gt50":[{"part":"5223.0510","path":"3.B.4","quote":"(4) more than 50 percent of both cartilages removed, six percent;","textHash":"cfef0ee9","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscectomy-mixed-bilateral":[{"part":"5223.0510","path":"3.B.5","quote":"(5) for dates of injury on or after August 9, 2010, up to 50 percent of one cartilage and more than 50 percent of the other cartilage removed, five percent.","textHash":"d4dd92d3","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-meniscus-repair":[{"part":"5223.0510","path":"1","quote":"Subpart 1. General. For permanent partial impairment to the knee and lower leg, disability of the whole body is as provided in subparts 2 to 4. The percent of whole body disability under this part may not exceed the percent of whole body disability for amputation of the leg at the knee under part 5223.0550. Each mutually exclusive impairing condition must be rated separately and the ratings must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is represented by a category designated as exclusive under subpart 2, it must be rated by that category only and that rating may not be combined with a rating under any other category of this part for that impairing condition. If an impairing condition is represented by a category designated as combinable under subpart 3, it must be rated under that category and under the appropriate categories describing loss of function under subpart 4. The ratings obtained must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is not represented by a category designated either exclusive or combinable, it must be rated only under the appropriate categories describing loss of function under subpart 4.","textHash":"3bbb7c8f","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-unicondylar":[{"part":"5223.0510","path":"3.C.1","quote":"(1) unicondylar, seven percent;","textHash":"34b712cc","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-tkr":[{"part":"5223.0510","path":"3.C.2","quote":"(2) total condylar, eight percent;","textHash":"a78d17d1","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-patella-replacement":[{"part":"5223.0510","path":"3.C.3","quote":"(3) patella replacement, seven percent.","textHash":"06a0f7d2","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-acl-mild":[{"part":"5223.0510","path":"3.D.1.a","quote":"(a) mild: positive drawer sign, no pivot shift, three percent;","textHash":"3285ef77","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-acl-severe":[{"part":"5223.0510","path":"3.D.1.b","quote":"(b) severe: positive drawer sign, pivot shift, five percent;","textHash":"047285df","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-pcl":[{"part":"5223.0510","path":"3.D.2","quote":"(2) posterior, five percent.","textHash":"db0c1408","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-varus-deformity-to5":[{"part":"5223.0510","path":"3.E.1","quote":"(1) up to five degrees, zero percent;","textHash":"f8743280","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-varus-deformity-6to15":[{"part":"5223.0510","path":"3.E.2","quote":"(2) between six degrees and 15 degrees, two percent;","textHash":"e5f34e95","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-varus-deformity-gt15":[{"part":"5223.0510","path":"3.E.3","quote":"(3) greater than 15 degrees, four percent.","textHash":"7d8c5920","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-valgus-deformity-to10":[{"part":"5223.0510","path":"3.F.1","quote":"(1) up to ten degrees, zero percent;","textHash":"76aee89b","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-valgus-deformity-11to20":[{"part":"5223.0510","path":"3.F.2","quote":"(2) between 11 degrees and 20 degrees, two percent;","textHash":"355501db","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-valgus-deformity-gt20":[{"part":"5223.0510","path":"3.F.3","quote":"(3) greater than 20 degrees, four percent.","textHash":"c8eda218","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-osteotomy":[{"part":"5223.0510","path":"3.G","quote":"G. Proximal tibial osteotomy, four percent.","textHash":"d5e89819","url":"https://www.revisor.mn.gov/rules/5223.0510/"},{"part":"5223.0510","path":"3.H","quote":"H. Distal femoral osteotomy, four percent.","textHash":"7bc709be","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-other-0":[{"part":"5223.0510","path":"3.I","quote":"I. Fracture or dislocation involving the femur, tibia, or fibula not otherwise ratable under subpart 2 or 3 or part 5223.0500 or 5223.0520, zero percent. For dates of injury on or after August 9, 2010, fracture or dislocation involving the patella not otherwise rated under this subpart, subpart 2, or part 5223.0500 or 5223.0520, zero percent.","textHash":"2648e718","url":"https://www.revisor.mn.gov/rules/5223.0510/"}],"knee-unlisted-rom":[{"part":"5223.0510","path":"1","quote":"Subpart 1. General. For permanent partial impairment to the knee and lower leg, disability of the whole body is as provided in subparts 2 to 4. The percent of whole body disability under this part may not exceed the percent of whole body disability for amputation of the leg at the knee under part 5223.0550. Each mutually exclusive impairing condition must be rated separately and the ratings must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is represented by a category designated as exclusive under subpart 2, it must be rated by that category only and that rating may not be combined with a rating under any other category of this part for that impairing condition. If an impairing condition is represented by a category designated as combinable under subpart 3, it must be rated under that category and under the appropriate categories describing loss of function under subpart 4. The ratings obtained must be combined as described in part 5223.0300, subpart 3, item E. If an impairing condition is not represented by a category designated either exclusive or combinable, it must be rated only under the appropriate categories describing loss of function under subpart 4.","textHash":"3bbb7c8f","url":"https://www.revisor.mn.gov/rules/5223.0510/"}]},"edges":[{"kind":"lesserIncluded","from":"knee-patellar-shaving","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-patellar-shaving","to":"knee-patella-fracture"},{"kind":"crossReference","from":"knee-painful-organic-syndrome","to":"5223.0310:40","note":"Term defined at Minn. R. 5223.0310, subp. 40."},{"kind":"lesserIncluded","from":"knee-meniscectomy-partial","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscectomy-partial","to":"knee-unicondylar"},{"kind":"lesserIncluded","from":"knee-meniscectomy-subtotal","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscectomy-subtotal","to":"knee-unicondylar"},{"kind":"lesserIncluded","from":"knee-meniscectomy-both-lt50","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscectomy-both-gt50","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscectomy-mixed-bilateral","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscus-repair","to":"knee-tkr"},{"kind":"lesserIncluded","from":"knee-meniscus-repair","to":"knee-unicondylar"},{"kind":"crossReference","from":"knee-meniscus-repair","to":"5223.0550"},{"kind":"crossReference","from":"knee-meniscus-repair","to":"5223.0300"},{"kind":"crossReference","from":"knee-other-0","to":"5223.0500"},{"kind":"crossReference","from":"knee-other-0","to":"5223.0520"},{"kind":"crossReference","from":"knee-unlisted-rom","to":"5223.0550"},{"kind":"crossReference","from":"knee-unlisted-rom","to":"5223.0300"},{"kind":"capBy","from":"5223.0510","to":"5223.0550","note":"Subp. 1: the whole-part total may not exceed the whole-body percent for amputation of the leg at the knee, 34 percent (R. 5223.0550, subp. 1.E)."},{"kind":"crossReference","from":"5223.0510","to":"5223.0420","note":"Subp. 2.H(4): entrapment with objectively demonstrable motor loss rates under the motor nerve table of 5223.0420 (common and deep peroneal, superficial peroneal, tibial rows)."},{"kind":"crossReference","from":"5223.0510","to":"5223.0430","note":"Subp. 2.H(4): entrapment with objectively demonstrable sensory loss rates under the sensory nerve table of 5223.0430."},{"kind":"crossReference","from":"5223.0510","to":"5223.0500","note":"Subp. 3.I excludes fractures ratable under the hip part; a femur fracture is rated where the rule that most closely represents it lives."},{"kind":"crossReference","from":"5223.0510","to":"5223.0520","note":"Subp. 3.I excludes fractures ratable under the ankle part; a distal tibia or fibula fracture may belong there."}]}}