ICD-10-CM · FY 2026 APRIL UPDATE

T78.1

Other adverse food reactions, not elsewhere classified

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027

SourceCMS ICD-10-CM order file

ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODE	DESCRIPTION	TYPE
T78.11	Other adverse food reactions due to milk and dairy products	Category
T78.110	Other adverse food reactions due to milk and dairy products with tolerance to baked milk	Category
T78.110A	Other adverse food reactions due to milk and dairy products with tolerance to baked milk, initial encounter	Billable
T78.110D	Other adverse food reactions due to milk and dairy products with tolerance to baked milk, subsequent encounter	Billable
T78.110S	Other adverse food reactions due to milk and dairy products with tolerance to baked milk, sequela	Billable
T78.111	Other adverse food reaction due to milk and dairy products with reactivity to baked milk	Category
T78.111A	Other adverse food reaction due to milk and dairy products with reactivity to baked milk, initial encounter	Billable
T78.111D	Other adverse food reaction due to milk and dairy products with reactivity to baked milk, subsequent encounter	Billable
T78.111S	Other adverse food reaction due to milk and dairy products with reactivity to baked milk, sequela	Billable
T78.119	Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified	Category
T78.119A	Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, initial encounter	Billable
T78.119D	Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, subsequent encounter	Billable
T78.119S	Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, sequela	Billable
T78.12	Other adverse food reaction due to eggs	Category
T78.120	Other adverse food reaction due to egg with tolerance to baked egg	Category
T78.120A	Other adverse food reaction due to egg with tolerance to baked egg, initial encounter	Billable
T78.120D	Other adverse food reaction due to egg with tolerance to baked egg, subsequent encounter	Billable
T78.120S	Other adverse food reaction due to egg with tolerance to baked egg, sequela	Billable
T78.121	Other adverse food reaction due to egg with reactivity to baked egg	Category
T78.121A	Other adverse food reaction due to egg with reactivity to baked egg, initial encounter	Billable
T78.121D	Other adverse food reaction due to egg with reactivity to baked egg, subsequent encounter	Billable
T78.121S	Other adverse food reaction due to egg with reactivity to baked egg, sequela	Billable
T78.129	Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified	Category
T78.129A	Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, initial encounter	Billable
T78.129D	Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, subsequent encounter	Billable
T78.129S	Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, sequela	Billable
T78.19	Other adverse food reactions, not elsewhere classified	Category
T78.19XA	Other adverse food reactions, not elsewhere classified, initial encounter	Billable
T78.19XD	Other adverse food reactions, not elsewhere classified, subsequent encounter	Billable
T78.19XS	Other adverse food reactions, not elsewhere classified, sequela	Billable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.