ICD-10-CM › S00-T88 › T66-T78 › T78.11 Other adverse food reactions due... › T78.110

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2026 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

• T78.110A Other adverse food reactions due to milk and dairy products with tolerance to baked milk, initial encounter
• T78.110D Other adverse food reactions due to milk and dairy products with tolerance to baked milk, subsequent encounter
• T78.110S Other adverse food reactions due to milk and dairy products with tolerance to baked milk, sequela

This code requires a seventh character. See the rule below.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from T78 Adverse effects, not elsewhere classified

Seventh character required

• The appropriate 7th character is to be added to each code from category T78

Excludes2 - not included here

• complications of surgical and medical care NEC (T80-T88)

Inherited from the T66-T78 section Other and unspecified effects of external causes (T66-T78)

Code also

• , if applicable, place of occurrence, such as:
• highway rest stop (Y92.523)
• school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
• service areas as the place of occurrence of the external cause (Y92.52-)
• single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
• transport vehicle as the place of occurrence of the external cause (Y92.81-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• Disorder > allergic
• Hypersusceptibility
• Reaction > allergic
• Sensitive, sensitivity
• Hypersensitive, hypersensitiveness, hypersensitivity
• Allergy, allergic > dairy products > with > tolerance to baked milk
• Allergy, allergic > milk protein > adverse reaction NEC > with > tolerance to baked milk

Codes in the same group

Code	Description	Status
T78.111	Other adverse food reaction due to milk and dairy products with reactivity to baked milk	Not billable
T78.119	Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified	Not billable