| S56.311 | Strain of extensor or abductor muscles, fascia and tendons of right thumb at forearm level | NON-BILLABLE CODE |
| S56.311A | Strain of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, initial encounter | BILLABLE CODE |
| S56.311D | Strain of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, subsequent encounter | BILLABLE CODE |
| S56.311S | Strain of extensor or abductor muscles, fascia and tendons of right thumb at forearm level, sequela | BILLABLE CODE |
| S56.312 | Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level | NON-BILLABLE CODE |
| S56.312A | Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level, initial encounter | BILLABLE CODE |
| S56.312D | Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level, subsequent encounter | BILLABLE CODE |
| S56.312S | Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level, sequela | BILLABLE CODE |
| S56.319 | Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level | NON-BILLABLE CODE |
| S56.319A | Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, initial encounter | BILLABLE CODE |
| S56.319D | Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, subsequent encounter | BILLABLE CODE |
| S56.319S | Strain of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level, sequela | BILLABLE CODE |
