ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.4 > S66.41 > S66.411 S66.411 Strain of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level Non-Billable/Non-Specific Codes S66.411A..., initial encounterS66.411D..., subsequent encounterS66.411S..., sequela