T45.1X5 Adverse effect of antineoplastic and immunosuppressive drugs
The ICD-10-CM code for Adverse effect of antineoplastic and immunosuppressive drugs is T45.1X5 (FY2026). It is a billable, claim-ready diagnosis code.
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
Anemia due to chemo/immuno/radiotherapy—sequence anemia first2) Anemia associated with chemotherapy, immunotherapy and radiation therapy When the admission/encounter is for management of an anemia associated with an adverse effect of the administration of chemotherapy or immunotherapy and the only treatment is for the anemia, the anemia code is sequenced first followed by the appropriate codes for the neoplasm and the adverse effect (T45.1X5-, Adverse effect of antineoplastic and immunosuppressive drugs). When the admission/encounter is for management of an anemia associated with an adverse effect of radiotherapy, the anemia code should be sequenced first, followed by the appropriate neoplasm code and code Y84.2, Radiological procedure and radiotherapy as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure.
Sequence blood vessel/nerve injury first (fragment)injury is to the blood vessels or nerves, that injury should be sequenced first.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026