T45.9
Header — not billablePoisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
The ICD-10 code for poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent is T45.9.
T45.9 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under T45.9
- 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 in this category
- T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugsnon-billable header
- T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugsnon-billable header
- T45.2Poisoning by, adverse effect of and underdosing of vitaminsnon-billable header
- T45.3Poisoning by, adverse effect of and underdosing of enzymesnon-billable header
- T45.4Poisoning by, adverse effect of and underdosing of iron and its compoundsnon-billable header
- T45.5Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugsnon-billable header
- T45.6Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugsnon-billable header
- T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulantsnon-billable header
- T45.8Poisoning by, adverse effect of and underdosing of other primarily systemic and hematological agentsnon-billable header
- T45.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugsnon-billable header
- T45.9Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agentnon-billable header