T45.521
Poisoning by antithrombotic drugs, accidental (unintentional)
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 4
T45.521code
Inclusion terms
- Poisoning by antithrombotic drug NOS
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 filed at T45.5
The index files this at T45.5. The tabular
extends it — laterality, staging, or the 7th character — so these entries
lead to the family rather than to T45.521 exactly.
- Adverse effect — see Table of Drugs and Chemicals, categories T36-T50, with 6th character 5
Alongside this code 5 same parent — T45.52
T45.522 Poisoning by antithrombotic drugs, intentional self-harm category T45.523 Poisoning by antithrombotic drugs, assault category T45.524 Poisoning by antithrombotic drugs, undetermined category T45.525 Adverse effect of antithrombotic drugs category T45.526 Underdosing of antithrombotic drugs category
Subordinate codes 3
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.