ICD-10-CM 2027 diagnosis code
T45Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
Not billable — use a more specific code
T45 is a header code, so it can't be reported by itself. Choose one of the 11 more specific codes beneath it.Short description: Primarily systemic and hematological agents, NEC
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T45
T45 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified. It belongs to block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 11 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: T45.0 (drugs), T45.1 (drugs), T45.2 (vitamins), T45.3 (enzymes), T45.4 (compounds), T45.5 (drugs), T45.6 (drugs), T45.7 (coagulants) and 3 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under T45
- T45.0Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
- T45.0XPoisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
- T45.0X1Poisoning by antiallergic and antiemetic drugs, accidental (unintentional)
- T45.0X2Poisoning by antiallergic and antiemetic drugs, intentional self-harm
- T45.0X3Poisoning by antiallergic and antiemetic drugs, assault
- T45.0X4Poisoning by antiallergic and antiemetic drugs, undetermined
- T45.0X5Adverse effect of antiallergic and antiemetic drugs
- T45.0X6Underdosing of antiallergic and antiemetic drugs
- T45.0XPoisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
- T45.1Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs
- T45.1XPoisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs
- T45.1X1Poisoning by antineoplastic and immunosuppressive drugs, accidental (unintentional)
- T45.1X2Poisoning by antineoplastic and immunosuppressive drugs, intentional self-harm
- T45.1X3Poisoning by antineoplastic and immunosuppressive drugs, assault
- T45.1X4Poisoning by antineoplastic and immunosuppressive drugs, undetermined
- T45.1X5Adverse effect of antineoplastic and immunosuppressive drugs
- T45.1X6Underdosing of antineoplastic and immunosuppressive drugs
- T45.1XPoisoning 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
- T45.4XPoisoning by, adverse effect of and underdosing of iron and its compounds
- T45.4X1Poisoning by iron and its compounds, accidental (unintentional)
- T45.4X2Poisoning by iron and its compounds, intentional self-harm
- T45.4X3Poisoning by iron and its compounds, assault
- T45.4X4Poisoning by iron and its compounds, undetermined
- T45.4X5Adverse effect of iron and its compounds
- T45.4X6Underdosing of iron and its compounds
- T45.4XPoisoning by, adverse effect of and underdosing of iron and its compounds
- T45.5Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
- T45.51Poisoning by, adverse effect of and underdosing of anticoagulants
- T45.52Poisoning by, adverse effect of and underdosing of antithrombotic drugs
- T45.521Poisoning by antithrombotic drugs, accidental (unintentional)
- T45.522Poisoning by antithrombotic drugs, intentional self-harm
- T45.523Poisoning by antithrombotic drugs, assault
- T45.524Poisoning by antithrombotic drugs, undetermined
- T45.525Adverse effect of antithrombotic drugs
- T45.526Underdosing of antithrombotic drugs
- T45.6Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugs
- T45.60Poisoning by, adverse effect of and underdosing of unspecified fibrinolysis-affecting drugs
- T45.601Poisoning by unspecified fibrinolysis-affecting drugs, accidental (unintentional)
- T45.602Poisoning by unspecified fibrinolysis-affecting drugs, intentional self-harm
- T45.603Poisoning by unspecified fibrinolysis-affecting drugs, assault
- T45.604Poisoning by unspecified fibrinolysis-affecting drugs, undetermined
- T45.605Adverse effect of unspecified fibrinolysis-affecting drugs
- T45.606Underdosing of unspecified fibrinolysis-affecting drugs
- T45.61Poisoning by, adverse effect of and underdosing of thrombolytic drugs
- T45.611Poisoning by thrombolytic drug, accidental (unintentional)
- T45.612Poisoning by thrombolytic drug, intentional self-harm
- T45.613Poisoning by thrombolytic drug, assault
- T45.614Poisoning by thrombolytic drug, undetermined
- T45.615Adverse effect of thrombolytic drugs
- T45.616Underdosing of thrombolytic drugs
- T45.62Poisoning by, adverse effect of and underdosing of hemostatic drugs
- T45.69Poisoning by, adverse effect of and underdosing of other fibrinolysis-affecting drugs
- T45.691Poisoning by other fibrinolysis-affecting drugs, accidental (unintentional)
- T45.692Poisoning by other fibrinolysis-affecting drugs, intentional self-harm
- T45.693Poisoning by other fibrinolysis-affecting drugs, assault
- T45.694Poisoning by other fibrinolysis-affecting drugs, undetermined
- T45.695Adverse effect of other fibrinolysis-affecting drugs
- T45.696Underdosing of other fibrinolysis-affecting drugs
- T45.60Poisoning by, adverse effect of and underdosing of unspecified fibrinolysis-affecting drugs
- T45.7Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants
- T45.7XPoisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants
- T45.7X1Poisoning by anticoagulant antagonists, vitamin K and other coagulants, accidental (unintentional)
- T45.7X2Poisoning by anticoagulant antagonists, vitamin K and other coagulants, intentional self-harm
- T45.7X3Poisoning by anticoagulant antagonists, vitamin K and other coagulants, assault
- T45.7X4Poisoning by anticoagulant antagonists, vitamin K and other coagulants, undetermined
- T45.7X5Adverse effect of anticoagulant antagonists, vitamin K and other coagulants
- T45.7X6Underdosing of anticoagulant antagonist, vitamin K and other coagulants
- T45.7XPoisoning 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
- T45.8XPoisoning by, adverse effect of and underdosing of other primarily systemic and hematological agents
- T45.8X1Poisoning by other primarily systemic and hematological agents, accidental (unintentional)
- T45.8X2Poisoning by other primarily systemic and hematological agents, intentional self-harm
- T45.8X3Poisoning by other primarily systemic and hematological agents, assault
- T45.8X4Poisoning by other primarily systemic and hematological agents, undetermined
- T45.8X5Adverse effect of other primarily systemic and hematological agents
- T45.8X6Underdosing of other primarily systemic and hematological agents
- T45.8XPoisoning by, adverse effect of and underdosing of other primarily systemic and hematological agents
- T45.9Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
- 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
- T45.APoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
- T45.AXPoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
- T45.AX1Poisoning by immune checkpoint inhibitors and immunostimulant drugs, accidental (unintentional)
- T45.AX2Poisoning by immune checkpoint inhibitors and immunostimulant drugs, intentional self-harm
- T45.AX3Poisoning by immune checkpoint inhibitors and immunostimulant drugs, assault
- T45.AX4Poisoning by immune checkpoint inhibitors and immunostimulant drugs, undetermined
- T45.AX5Adverse effect of immune checkpoint inhibitors and immunostimulant drugs
- T45.AX6Underdosing of immune checkpoint inhibitors and immunostimulant drugs
- T45.AXPoisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
Notes that apply from higher levels
Instructions written at a parent level also apply to T45.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T45
Is T45 billable?
- No. T45 is a header code. Report one of its more specific subcodes instead.