ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.2 > S86.21 > S86.212 S86.212 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg Non-Billable/Non-Specific Codes S86.212A..., initial encounterS86.212D..., subsequent encounterS86.212S..., sequela