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ICD-10-CM 2027 diagnosis code

T78.1XXAOther adverse food reactions, not elsewhere classified, initial encounter

Deleted in FY2026Requires 7th character

T78.1XXA was removed from ICD-10-CM in FY2026 and can't be reported for dates of service on or after October 1, 2025.Short description: Oth adverse food reactions, not elsewhere classified, init

Code last changed in FY2016 (effective October 1, 2015). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T78.1XXA

T78.1XXA was the ICD-10-CM code for other adverse food reactions, not elsewhere classified, initial encounter until it was deleted in FY2026. It can't be reported for dates of service on or after October 1, 2025.

7th character

Ainitial encounter

Other encounter types for T78.1:

Notes that apply from higher levels

Instructions written at a parent level also apply to T78.1XXA.

› From T78.1 Other adverse food reactions, not elsewhere classified
Excludes1
  • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
  • anaphylactic reaction due to food (T78.0-)
  • bacterial food borne intoxications (A05.-)
Excludes2
  • allergic and dietetic gastroenteritis and colitis (K52.29)
  • allergic rhinitis due to food (J30.5)
  • dermatitis due to food in contact with skin (L23.6, L24.6, L25.4)
  • dermatitis due to ingested food (L27.2)
  • food protein-induced enterocolitis syndrome (K52.21)
  • food protein-induced enteropathy (K52.22)
Use additional code
  • code to identify the type of reaction, if applicable
› From T78 Adverse effects, not elsewhere classified
Excludes2
  • complications of surgical and medical care NEC (T80-T88)

Broader instructions also apply from T66-T78 Other and unspecified effects of external causes 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)
  • FY2026 (effective 10/1/2025): Deleted

Common questions about T78.1XXA

Is T78.1XXA billable?

No. T78.1XXA was deleted in FY2026.