T45 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified.
Seventh character note
The appropriate 7th character is to be added to each code from category T45
Seventh character extensions
A: initial encounter
D: subsequent encounter
S: sequela
Codes
T45.0
Poisoning by, adverse effect of and underdosing of antiallergic and antiemetic drugs
T45.1
Poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drugs
T45.2
Poisoning by, adverse effect of and underdosing of vitamins
T45.3
Poisoning by, adverse effect of and underdosing of enzymes
T45.4
Poisoning by, adverse effect of and underdosing of iron and its compounds
T45.5
Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
T45.6
Poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugs
T45.7
Poisoning by, adverse effect of and underdosing of anticoagulant antagonists, vitamin K and other coagulants
T45.8
Poisoning by, adverse effect of and underdosing of other primarily systemic and hematological agents
T45.9
Poisoning by, adverse effect of and underdosing of unspecified primarily systemic and hematological agent
T45.A
Poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code