ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.8 > S66.89 S66.89 Other injury of other specified muscles, fascia and tendons at wrist and hand level Non-Billable/Non-Specific Codes S66.891Other injury of other specified muscles, fascia and tendons at wrist and hand level, right handS66.891A..., initial encounterS66.891D..., subsequent encounterS66.891S..., sequelaS66.892Other injury of other specified muscles, fascia and tendons at wrist and hand level, left handS66.892A..., initial encounterS66.892D..., subsequent encounterS66.892S..., sequelaS66.899Other injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified handS66.899A..., initial encounterS66.899D..., subsequent encounterS66.899S..., sequela