T78.1

ICD-10Non-billable category

Other adverse food reactions, not elsewhere classified

Official ICD-10-CM descriptor (FY2026)

Other adverse food reactions, not elsewhere classified

T78.1 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
  • anaphylactic reaction due to food (T78.0-)
  • bacterial food borne intoxications (A05.-)

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

  • 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

Report an additional code to identify the associated condition.

  • code to identify the type of reaction, if applicable

ICD-10-CM FY2026 defines 3 codes beneath T78.1. See the ICD-10-CM index for what this site publishes.

Related codes in T78

Where this code sits

Parent code
T78

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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