ICD-10-CM > S00-T88 > S90-S99 > S96 > S96.9 > S96.91 > S96.912 S96.912 Strain of unspecified muscle and tendon at ankle and foot level, left foot Non-Billable/Non-Specific Codes S96.912A..., initial encounterS96.912D..., subsequent encounterS96.912S..., sequela