2025 ICD-10-CM Diagnosis Code T45.AX
Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
- ICD-10-CM Code:
- T45.AX
- ICD-10 Code for:
- Immune checkpoint inhibitors and immunostimulant drugs
- Is Billable?
- Not Valid for Submission
- Code Navigator:
T45.AX is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs. The code is not specific and is NOT valid for the year 2025 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.
Specific Coding Applicable to Immune checkpoint inhibitors and immunostimulant drugs
Non-specific codes like T45.AX require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for immune checkpoint inhibitors and immunostimulant drugs:
T45.AX1 for Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional) - NON-BILLABLE CODE
Use T45.AX1A for initial encounter - BILLABLE CODE
Use T45.AX1D for subsequent encounter - BILLABLE CODE
Use T45.AX1S for sequela - BILLABLE CODE
T45.AX2 for Poisoning by immune checkpoint inhibitors and immunostimulant drugs, intentional self-harm - NON-BILLABLE CODE
Use T45.AX2A for initial encounter - BILLABLE CODE
Use T45.AX2D for subsequent encounter - BILLABLE CODE
Use T45.AX2S for sequela - BILLABLE CODE
T45.AX3 for Poisoning by immune checkpoint inhibitors and immunostimulant drugs, assault - NON-BILLABLE CODE
Use T45.AX3A for initial encounter - BILLABLE CODE
Use T45.AX3D for subsequent encounter - BILLABLE CODE
Use T45.AX3S for sequela - BILLABLE CODE
T45.AX4 for Poisoning by immune checkpoint inhibitors and immunostimulant drugs, undetermined - NON-BILLABLE CODE
Use T45.AX4A for initial encounter - BILLABLE CODE
Use T45.AX4D for subsequent encounter - BILLABLE CODE
Use T45.AX4S for sequela - BILLABLE CODE
T45.AX5 for Adverse effect of immune checkpoint inhibitors and immunostimulant drugs - NON-BILLABLE CODE
Use T45.AX5A for initial encounter - BILLABLE CODE
Use T45.AX5D for subsequent encounter - BILLABLE CODE
Use T45.AX5S for sequela - BILLABLE CODE
T45.AX6 for Underdosing of immune checkpoint inhibitors and immunostimulant drugs - NON-BILLABLE CODE
Use T45.AX6A for initial encounter - BILLABLE CODE
Use T45.AX6D for subsequent encounter - BILLABLE CODE
Use T45.AX6S for sequela - BILLABLE CODE
Coding Guidelines
When coding a poisoning or reaction to the improper use of a medication (e.g., overdose, wrong substance given or taken in error, wrong route of administration), first assign the appropriate code from categories T36-T50. The poisoning codes have an associated intent as their 5th or 6th character (accidental, intentional self-harm, assault and undetermined. If the intent of the poisoning is unknown or unspecified, code the intent as accidental intent. The undetermined intent is only for use if the documentation in the record specifies that the intent cannot be determined. Use additional code(s) for all manifestations of poisonings.
The appropriate 7th character is to be added to each code from block Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified (T45). Use the following options for the aplicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
