T45 Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
The ICD-10-CM code for Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified is T45 (FY2026). It is a non-billable category code — select a more specific code below for claims.
Classification
- Section
- T36-T50: Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
- Category T45
- 116 codes (90 billable)
- FY2026 Status
- Stable since FY2024
Official Coding Guidelines
Sequence blood vessel/nerve injury first (fragment)injury is to the blood vessels or nerves, that injury should be sequenced first.
Do not assign injury codes for iatrogenic injuries; code complication3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026