T45.A
Non-billablePoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
T45.A is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs. It is a non-billable category code — use a more specific child code such as T45.AX for billing.
S00-T88 Injury, poisoning and certain other consequences of external causes
Excludes1 — not coded here
- •poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drug (T45.1)
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code T45.A?
- T45.A is the ICD-10-CM code for "Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
- Is T45.A a billable code?
- No — T45.A is a non-billable header code. Use a more specific child code (such as T45.AX) for billing.
- What is excluded from T45.A?
- Excludes1 (not coded here): poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drug (T45.1).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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