ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.2 > S66.22 > S66.229 S66.229 Laceration of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level Non-Billable/Non-Specific Codes S66.229A..., initial encounterS66.229D..., subsequent encounterS66.229S..., sequela