Is T45.9 a billable code?
No. T45.9 is a header code that groups 0 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
T45.9: Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
T45.9 groups related diagnoses under poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Other codes in T45 Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
- T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugsheader
- T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugsheader
- T45.2Poisoning by, adverse effect of and underdosing of vitaminsheader
- T45.3Poisoning by, adverse effect of and underdosing of enzymesheader
- T45.4Poisoning by, adverse effect of and underdosing of iron and its compoundsheader
- T45.5Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugsheader
- T45.6Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugsheader
- T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulantsheader
- T45.8Poisoning by, adverse effect of and underdosing of other primarily systemic and hematological agentsheader
- T45.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugsheader
T45.9 questions
What does T45.9 mean?
T45.9 is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent. 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.