Billable / Specific Code
ICD-10-CM T45.AX1 is the diagnosis code for Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional). 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 billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where T45.AX1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, T45.AX1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
T45.AX1 is the ICD-10-CM diagnosis code for "Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional)". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of T45.AX1 is T45.AX ("Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs"). T45.AX1 provides a more specific classification within this category.
T45.AX1 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.
Use T45.AX1 when the patients documented diagnosis matches "Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional)" 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 immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional) is T45.AX1.
Yes, T45.AX1 can be used as a primary diagnosis code since it is billable and specific.
T45.AX1 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, T45.AX1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.