Non-Billable / Non-Specific Code
ICD-10-CM T45.1 is the diagnosis code for Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs. This code falls under the section "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as T45.1. They are mutually exclusive:
Understanding where T45.1 sits in the ICD-10-CM classification helps ensure proper coding:
No, T45.1 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
T45.1 is the ICD-10-CM diagnosis code for "Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T45.1 is T45 ("Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified"). T45.1 provides a more specific classification within this category.
T45.1 is located in Section T36-T50 — "Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances" within Chapter 19 of the ICD-10-CM Tabular List.
T45.1 has 1 sub-code(s) that provide more specific detail: T45.1X.
Use T45.1 when the patients documented diagnosis matches "Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs is T45.1.
No, T45.1 is non-billable. Use a more specific sub-code for primary diagnosis billing.
T45.1 is in Chapter 19 of the ICD-10-CM Tabular List.
Type 1 Excludes for T45.1 include: 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).
Yes, T45.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.