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ICD-10-CM 2027 diagnosis code

T61Toxic effect of noxious substances eaten as seafood

Not billable — use a more specific code

T61 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.

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 T61

T61 is the ICD-10-CM diagnosis code for toxic effect of noxious substances eaten as seafood. It belongs to block T51-T65 (toxic effects of substances chiefly nonmedicinal as to source) 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 5 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: T61.0 (poisoning), T61.1 (poisoning), T61.7 (poisoning), T61.8 (seafood) and T61.9 (seafood).

Don't report T61 together with the conditions in its Excludes1 note: anaphylactic reaction or shock due to adverse food reaction (T78.0-), bacterial foodborne intoxications (A05.-), dermatitis (L23.6, L25.4, L27.2), food protein-induced enterocolitis syndrome (K52.21) and 8 more.

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

Specific codes under T61

Coding notes

Excludes1Not coded here — never report together with this code
  • allergic reaction to food, such as:
  • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
  • bacterial foodborne intoxications (A05.-)
  • dermatitis (L23.6, L25.4, L27.2)
  • food protein-induced enterocolitis syndrome (K52.21)
  • food protein-induced enteropathy (K52.22)
  • gastroenteritis (noninfective) (K52.29)
  • toxic effect of aflatoxin and other mycotoxins (T64)
  • toxic effect of cyanides (T65.0-)
  • toxic effect of harmful algae bloom (T65.82-)
  • toxic effect of hydrogen cyanide (T57.3-)
  • toxic effect of mercury (T56.1-)
  • toxic effect of red tide (T65.82-)

Notes that apply from higher levels

Instructions written at a parent level also apply to T61.

Broader instructions also apply from T51-T65 Toxic effects of substances chiefly nonmedicinal as to source and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Codes whose notes reference T61

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 T61

Is T61 billable?

No. T61 is a header code. Report one of its more specific subcodes instead.