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M66.261 Musculoskeletal
Updated March 2026

Spontaneous rupture of extensor tendons, right lower leg

ICD-10 Code: M66.261 · Body Part: Ankle/Foot

QME Evaluation Process

Ankle and toe ROM testing, strength assessment. LE impairment for ROM and strength deficit.

Typical Impairment Rating

3-10% LE (1-4% WPI)

AMA Guides Edition

5th Edition

Common Treatments

+ Surgical repair
+ Physical therapy
+ Bracing

Related Conditions

Body Part Guide

Ankle/Foot Evaluation Guide

Impairment rating methods, common conditions, and QME evaluation protocols

View Guide →

QME Specialties for Spontaneous rupture of extensor tendons, right lower leg

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Browse QME-certified physicians who evaluate spontaneous rupture of extensor tendons, right lower leg and related ankle/foot conditions in California.

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Frequently Asked Questions

What is Spontaneous rupture of extensor tendons, right lower leg (M66.261)?

Spontaneous rupture of extensor tendons, right lower leg is an ICD-10 diagnosis code (M66.261) classified under Musculoskeletal conditions. It affects the Ankle/Foot and is occasionally seen in California workers' compensation claims. QME physicians evaluate this condition using AMA Guides 5th Edition protocols.

How is M66.261 rated for impairment?

The typical whole person impairment (WPI) range for Spontaneous rupture of extensor tendons, right lower leg is 3-10% LE (1-4% WPI). The exact rating depends on clinical findings, imaging, and the evaluation method (DRE or ROM) chosen by the QME physician per AMA Guides 5th Edition.

What is the QME evaluation process for M66.261?

Ankle and toe ROM testing, strength assessment. LE impairment for ROM and strength deficit.

What treatments are common for Spontaneous rupture of extensor tendons, right lower leg?

Common treatments for Spontaneous rupture of extensor tendons, right lower leg include Surgical repair, Physical therapy, Bracing. Treatment appropriateness and outcomes are considered during the QME evaluation when determining permanent and stationary status and apportionment.