| Full description | Strain of extensor or abductor muscles, fascia and tendons of left thumb at forearm level |
| Billable | No — use a more specific child code |
| Chapter | Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T88) |
| Section | Injuries to the elbow and forearm (S50-S59) |
| Parent code | S56.31 — Strain of extn/abdr musc/fasc/tend of thumb at forearm level |
| Requires 7th character | Yes |