ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.9 > S86.99 S86.99 Other injury of unspecified muscle and tendon at lower leg level Non-Billable/Non-Specific Codes S86.991Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right legS86.991A..., initial encounterS86.991D..., subsequent encounterS86.991S..., sequelaS86.992Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left legS86.992A..., initial encounterS86.992D..., subsequent encounterS86.992S..., sequelaS86.999Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified legS86.999A..., initial encounterS86.999D..., subsequent encounterS86.999S..., sequela