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ICD-10-CM 2027 diagnosis code

T46.3X1Poisoning by coronary vasodilators, accidental (unintentional)

Not billable — use a more specific codeRequires 7th character

T46.3X1 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Poisoning by coronary vasodilators, accidental

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 T46.3X1

T46.3X1 is the ICD-10-CM diagnosis code for poisoning by coronary vasodilators, accidental (unintentional). It belongs to category T46 (poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system), 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 3 subcodes must be used instead.

Within T46.3X (poisoning by, adverse effect of and underdosing of coronary vasodilators), T46.3X1 is specifically for poisoning by coronary vasodilators, accidental (unintentional). Related codes cover poisoning by coronary vasodilators, intentional self-harm (T46.3X2), poisoning by coronary vasodilators, assault (T46.3X3), poisoning by coronary vasodilators, undetermined (T46.3X4), adverse effect of coronary vasodilators (T46.3X5) and underdosing of coronary vasodilators (T46.3X6).

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 T46

Coding notes

Applicable toConditions and synonyms classified to this code
  • Poisoning by coronary vasodilators NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to T46.3X1.

› From T46.3 Poisoning by, adverse effect of and underdosing of coronary vasodilators
Excludes1
  • poisoning by, adverse effect of and underdosing of
  • calcium-channel blockers (T46.1)
› From T46 Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system
Excludes1
  • poisoning by, adverse effect of and underdosing of metaraminol (T44.4)

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.

Table of Drugs & Neoplasms entries

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 T46.3X1

Is T46.3X1 billable?

No. T46.3X1 is a header code. Report one of its more specific subcodes instead.