ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.2 > S86.29 > S86.291 S86.291 Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg Non-Billable/Non-Specific Codes S86.291A..., initial encounterS86.291D..., subsequent encounterS86.291S..., sequela