T45.521Header code — not billable
Poisoning by antithrombotic drugs, accidental (unintentional)
Short description: Poisoning by antithrombotic drugs, accidental
- Chapter
- 19. Injury, poisoning and certain other consequences of external causes
- Category
- T45
- Effective date
- October 1, 2026
Related codes in category T45
T45Primarily systemic and hematological agents, NECT45.0Antiallergic and antiemetic drugsT45.0XAntiallergic and antiemetic drugsT45.0X1Poisoning by antiallerg/antiemetic, accidentalT45.0X1APoisoning by antiallerg/antiemetic, accidental, initYesT45.0X1DPoisoning by antiallerg/antiemetic, accidental, subsYesT45.0X1SPoisoning by antiallerg/antiemetic, accidental, sequelaYesT45.0X2Poisoning by antiallerg/antiemetic, intentional self-harmT45.0X2APoisoning by antiallerg/antiemetic, self-harm, initYesT45.0X2DPoisoning by antiallerg/antiemetic, self-harm, subsYesT45.0X2SPoisoning by antiallerg/antiemetic, self-harm, sequelaYesT45.0X3Poisoning by antiallergic and antiemetic drugs, assault
Frequently asked questions
What is ICD-10 code T45.521?
T45.521 is an ICD-10-CM diagnosis code for Poisoning by antithrombotic drugs, accidental (unintentional).
Is T45.521 a billable code?
No. T45.521 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is T45.521 in?
T45.521 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.
When did T45.521 become effective?
T45.521 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to T45.521?
T45.521 belongs to category T45, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.