2025 ICD-10-CM Diagnosis Code T45.AX1A

Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional), initial encounter

  • T45.AX1A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Poisn by immune chkpt inhibtr/immunostim drugs, acc, init
  • ICD-10-CM T45.AX1A is a new 2025 ICD-10-CM code that became effective on October 1, 2024.
  • This is the American ICD-10-CM version of T45.AX1A – other international versions of ICD-10 T45.AX1A may differ.

The following code(s) above T45.AX1A contain annotation back-references

 that may be applicable to T45.AX1A:

  • S00-T88  Injury, poisoning and certain other consequences of external causes
  • T36-T50  Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
  • T45.A  Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
  • T45.AX1  Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional)

ICD-10-CM T45.AX1A is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 917 Poisoning and toxic effects of drugs with mcc
  • 918 Poisoning and toxic effects of drugs without mcc

Code History

  • 2025 (effective 10/1/2024): New code
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