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)
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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