ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.0 > S66.09 > S66.091 S66.091 Other specified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level Non-Billable/Non-Specific Codes S66.091A..., initial encounterS66.091D..., subsequent encounterS66.091S..., sequela