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