ICD-10-CM > S00-T88 > S90-S99 > S96 > S96.2 > S96.21 > S96.212 S96.212 Strain of intrinsic muscle and tendon at ankle and foot level, left foot Non-Billable/Non-Specific Codes S96.212A..., initial encounterS96.212D..., subsequent encounterS96.212S..., sequela