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T45.1

Non-billable

Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs

T45.1 is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs. It is a non-billable category code — use a more specific child code such as T45.1X for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
T45
Subcodes
1
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

Excludes1 — not coded here

  • •poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs (T45.A)
  • •poisoning by, adverse effect of and underdosing of tamoxifen (T38.6)

Frequently asked questions

What is ICD-10 code T45.1?
T45.1 is the ICD-10-CM code for "Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is T45.1 a billable code?
No — T45.1 is a non-billable header code. Use a more specific child code (such as T45.1X) for billing.
What are the subcodes of T45.1?
T45.1 has 1 more specific child code, including T45.1X.
What is excluded from T45.1?
Excludes1 (not coded here): poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs (T45.A); poisoning by, adverse effect of and underdosing of tamoxifen (T38.6).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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