| Billable | No — use a more specific child code |
| Chapter | Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T88) |
| Section | Toxic effects of substances chiefly nonmedicinal as to source (T51-T65) |
| Parent code | T65.1X — Toxic effect of strychnine and its salts |
| Requires 7th character | Yes |