ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.9 > S66.91 > S66.912 S66.912 Strain of unspecified muscle, fascia and tendon at wrist and hand level, left hand Non-Billable/Non-Specific Codes S66.912A..., initial encounterS66.912D..., subsequent encounterS66.912S..., sequela