ICD-10-CM Diagnosis Code (2025)
Official Description for T45
Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified
Coding Notes & Guidelines for T45
poisoning by, adverse effect of and underdosing of phenothiazine-based neuroleptics (T43.3)
- poisoning by, adverse effect of and underdosing of immune checkpoint inhibitors and immunostimulant drugs (T45.A)
- poisoning by, adverse effect of and underdosing of tamoxifen (T38.6)
vitamin deficiencies (E50-E56)
iron deficiency (E61.1)
vitamin K deficiency (E56.1)
poisoning by, adverse effect of and underdosing of antineoplastic and immunosuppressive drug (T45.1)
- poisoning by, adverse effect of and underdosing of nicotinic acid (derivatives) (T46.7)
- poisoning by, adverse effect of and underdosing of iron (T45.4)
- poisoning by, adverse effect of and underdosing of vitamin K (T45.7)
- poisoning by, adverse effect of and underdosing of aspirin (T39.01-)
- poisoning by, adverse effect of and underdosing of acetylsalicylic acid (T39.01-)
- poisoning by, adverse effect of and underdosing of immunoglobulin (T50.Z1)
- poisoning by, adverse effect of and underdosing of iron (T45.4)
- transfusion reactions (T80.-)
Poisoning by antiallergic and antiemetic drugs NOS
Poisoning by antineoplastic and immunosuppressive drugs NOS
Poisoning by vitamins NOS
Poisoning by enzymes NOS
Poisoning by iron and its compounds NOS
Poisoning by anticoagulants NOS
Poisoning by, adverse effect of and underdosing of antiplatelet drugs
Poisoning by antithrombotic drug NOS
Poisoning by fibrinolysis-affecting drug NOS
Poisoning by thrombolytic drug NOS
Poisoning by hemostatic drug NOS
Poisoning by other fibrinolysis-affecting drug NOS
Poisoning by anticoagulant antagonists, vitamin K and other coagulants NOS
- Poisoning by, adverse effect of and underdosing of liver preparations and other antianemic agents
- Poisoning by, adverse effect of and underdosing of natural blood and blood products
- Poisoning by, adverse effect of and underdosing of plasma substitute
Poisoning by other primarily systemic and hematological agents NOS
Poisoning by primarily systemic and hematological agent NOS
Poisoning by immune checkpoint inhibitors and immunosuppressive drugs NOS
The appropriate 7th character is to be added to each code from category T45
- A: initial encounter
- D: subsequent encounter
- S: sequela
Child Codes (More Specific Codes for T45):
About ICD-10-CM Code T45 (Poisoning by)
ICD-10-CM code T45 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM T45 became effective on October 1, 2024.
This page provides detailed information about T45 - Poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Poisoning by related to adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified.