ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.2 > S86.21 > S86.211 S86.211 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg Non-Billable/Non-Specific Codes S86.211A..., initial encounterS86.211D..., subsequent encounterS86.211S..., sequela