ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.3 > S86.39 S86.39 Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level Non-Billable/Non-Specific Codes S86.391Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legS86.391A..., initial encounterS86.391D..., subsequent encounterS86.391S..., sequelaS86.392Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left legS86.392A..., initial encounterS86.392D..., subsequent encounterS86.392S..., sequelaS86.399Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified legS86.399A..., initial encounterS86.399D..., subsequent encounterS86.399S..., sequela