T45.9
T45.9 — Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
Non-billable headerICD-10-CM
T45.9 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category T45
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
T45.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead T45.9
6 child codes. Green means billable.
- T45.91Poisoning by unspecified primarily systemic and hematological agent, accidental (unintentional)
- T45.92Poisoning by unspecified primarily systemic and hematological agent, intentional self-harm
- T45.93Poisoning by unspecified primarily systemic and hematological agent, assault
- T45.94Poisoning by unspecified primarily systemic and hematological agent, undetermined
- T45.95Adverse effect of unspecified primarily systemic and hematological agent
- T45.96Underdosing of unspecified primarily systemic and hematological agent
Related codes at this level
Codes that share T45. If T45.9 is not quite right, the correct code is usually one of these.
- T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
- T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs
- T45.2Poisoning by, adverse effect of and underdosing of vitamins
- T45.3Poisoning by, adverse effect of and underdosing of enzymes
- T45.4Poisoning by, adverse effect of and underdosing of iron and its compounds
- T45.5Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
- T45.6Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugs
- T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants
- T45.8Poisoning by, adverse effect of and underdosing of other primarily systemic and hematological agents
- T45.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
Questions about T45.9
- Is T45.9 a billable ICD-10-CM code?
- No. T45.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T45.9 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).