Skip to content
Dx

ICD-10-CM 2027 diagnosis code

T45.61Poisoning by, adverse effect of and underdosing of thrombolytic drugs

Not billable — use a more specific codeRequires 7th character

T45.61 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it and add the required 7th character.Short description: Thrombolytic drugs

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T45.61

T45.61 is the ICD-10-CM diagnosis code for poisoning by, adverse effect of and underdosing of thrombolytic drugs. It belongs to category T45 (poisoning by, adverse effect of and underdosing of primarily systemic and hematological agents, not elsewhere classified), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within T45.6 (poisoning by, adverse effect of and underdosing of fibrinolysis-affecting drugs), T45.61 is specifically for poisoning by, adverse effect of and underdosing of thrombolytic drugs. Related codes cover unspecified fibrinolysis-affecting drugs (T45.60), hemostatic drugs (T45.62) and other fibrinolysis-affecting drugs (T45.69).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category T45

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to T45.61.

Broader instructions also apply from T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T45.61

Is T45.61 billable?

No. T45.61 is a header code. Report one of its more specific subcodes instead.