| Full description | Strain of intrinsic muscle, fascia and tendon of thumb at wrist and hand 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 wrist, hand and fingers (S60-S69) |
| Parent code | S66.4 — Injury of intrinsic musc/fasc/tend thumb at wrs/hnd lv |