ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.9 > S66.99 > S66.991 S66.991 Other injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand Non-Billable/Non-Specific Codes S66.991A..., initial encounterS66.991D..., subsequent encounterS66.991S..., sequela