Is T45.AX5 a billable code?
No. T45.AX5 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
T45.AX5: Adverse effect of immune checkpoint inhibitors and immunostimulant drugs
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
T45.AX5 groups related diagnoses under adverse effect of immune checkpoint inhibitors and immunostimulant drugs. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under T45.AX5
- T45.AX5AAdverse effect of immune checkpoint inhibitors and immunostimulant drugs, initial encounter
- T45.AX5DAdverse effect of immune checkpoint inhibitors and immunostimulant drugs, subsequent encounter
- T45.AX5SAdverse effect of immune checkpoint inhibitors and immunostimulant drugs, sequela
Other codes in T45.AX Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
- T45.AX1Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional)header
- T45.AX2Poisoning by immune checkpoint inhibitors and immunostimulant drugs, intentional self-harmheader
- T45.AX3Poisoning by immune checkpoint inhibitors and immunostimulant drugs, assaultheader
- T45.AX4Poisoning by immune checkpoint inhibitors and immunostimulant drugs, undeterminedheader
- T45.AX6Underdosing of immune checkpoint inhibitors and immunostimulant drugsheader
T45.AX5 questions
What does T45.AX5 mean?
T45.AX5 is the ICD-10-CM code for Adverse effect of immune checkpoint inhibitors and immunostimulant drugs. It is in chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.