ICD-10-CM > S00-T88 > S50-S59 > S56 > S56.3 S56.3 Injury of extensor or abductor muscles, fascia and tendons of thumb at forearm level Non-Billable/Non-Specific Codes S56.30Unspecified injury of extensor or abductor muscles, fascia and tendons of thumb at forearm levelS56.301Unspecified injury of extensor or abductor muscles, fascia and tendons of right thumb at forearm levelS56.301A..., initial encounterS56.301D..., subsequent encounterS56.301S..., sequelaS56.302Unspecified injury of extensor or abductor muscles, fascia and tendons of left thumb at forearm levelS56.302A..., initial encounterS56.302D..., subsequent encounterS56.302S..., sequelaS56.309Unspecified injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm levelS56.309A..., initial encounterS56.309D..., subsequent encounterS56.309S..., sequelaS56.31Strain of extensor or abductor muscles, fascia and tendons of thumb at forearm levelS56.311Strain of extensor or abductor muscles, fascia and tendons of right thumb at forearm levelS56.311A..., initial encounterS56.311D..., subsequent encounterS56.311S..., sequelaS56.312Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm levelS56.312A..., initial encounterS56.312D..., subsequent encounterS56.312S..., sequelaS56.319Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm levelS56.319A..., initial encounterS56.319D..., subsequent encounterS56.319S..., sequelaS56.32Laceration of extensor or abductor muscles, fascia and tendons of thumb at forearm levelS56.321Laceration of extensor or abductor muscles, fascia and tendons of right thumb at forearm levelS56.321A..., initial encounterS56.321D..., subsequent encounterS56.321S..., sequelaS56.322Laceration of extensor or abductor muscles, fascia and tendons of left thumb at forearm levelS56.322A..., initial encounterS56.322D..., subsequent encounterS56.322S..., sequelaS56.329Laceration of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm levelS56.329A..., initial encounterS56.329D..., subsequent encounterS56.329S..., sequelaS56.39Other injury of extensor or abductor muscles, fascia and tendons of thumb at forearm levelS56.391Other injury of extensor or abductor muscles, fascia and tendons of right thumb at forearm levelS56.391A..., initial encounterS56.391D..., subsequent encounterS56.391S..., sequelaS56.392Other injury of extensor or abductor muscles, fascia and tendons of left thumb at forearm levelS56.392A..., initial encounterS56.392D..., subsequent encounterS56.392S..., sequelaS56.399Other injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm levelS56.399A..., initial encounterS56.399D..., subsequent encounterS56.399S..., sequela