ICD-10-CM > S00-T88 > S60-S69 > S66 > S66.3 > S66.31 S66.31 Strain of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level Non-Billable/Non-Specific Codes S66.310Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand levelS66.310A..., initial encounterS66.310D..., subsequent encounterS66.310S..., sequelaS66.311Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand levelS66.311A..., initial encounterS66.311D..., subsequent encounterS66.311S..., sequelaS66.312Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand levelS66.312A..., initial encounterS66.312D..., subsequent encounterS66.312S..., sequelaS66.313Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand levelS66.313A..., initial encounterS66.313D..., subsequent encounterS66.313S..., sequelaS66.314Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand levelS66.314A..., initial encounterS66.314D..., subsequent encounterS66.314S..., sequelaS66.315Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand levelS66.315A..., initial encounterS66.315D..., subsequent encounterS66.315S..., sequelaS66.316Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand levelS66.316A..., initial encounterS66.316D..., subsequent encounterS66.316S..., sequelaS66.317Strain of extensor muscle, fascia and tendon of left little finger at wrist and hand levelS66.317A..., initial encounterS66.317D..., subsequent encounterS66.317S..., sequelaS66.318Strain of extensor muscle, fascia and tendon of other finger at wrist and hand levelS66.318A..., initial encounterS66.318D..., subsequent encounterS66.318S..., sequelaS66.319Strain of extensor muscle, fascia and tendon of unspecified finger at wrist and hand levelS66.319A..., initial encounterS66.319D..., subsequent encounterS66.319S..., sequela