ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.9 > S66.90 S66.90 Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level Non-Billable/Non-Specific Codes S66.901Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right handS66.901A..., initial encounterS66.901D..., subsequent encounterS66.901S..., sequelaS66.902Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left handS66.902A..., initial encounterS66.902D..., subsequent encounterS66.902S..., sequelaS66.909Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified handS66.909A..., initial encounterS66.909D..., subsequent encounterS66.909S..., sequela