T45.5
Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 2 never code together
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 3
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 1
- Adverse effect — see Table of Drugs and Chemicals, categories T36-T50, with 6th character 5
Alongside this code 10 same parent — T45
T45.0 Antiallergic and antiemetic drugs category T45.1 Antineoplastic and immunosuppressive drugs category T45.2 Poisoning by, adverse effect of and underdosing of vitamins category T45.3 Poisoning by, adverse effect of and underdosing of enzymes category T45.4 Iron and its compounds category T45.6 Fibrinolysis-affecting drugs category T45.7 Anticoagulant antagonists, vitamin K and oth coagulants category T45.8 Primarily systemic and hematological agents category T45.9 Unsp primarily systemic and hematological agent category T45.A Immune checkpoint inhibitors and immunostimulant drugs category
Subordinate codes 2
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.