ICD-10-CM > S00-T88 > S80-S89 > S86 > S86.9 > S86.90 > S86.909 S86.909 Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg Non-Billable/Non-Specific Codes S86.909A..., initial encounterS86.909D..., subsequent encounterS86.909S..., sequela