T78.111A Other adverse food reaction due to milk and dairy products with reactivity to baked milk, initial encounter

Billable ICD-10-CM code, FY2026.

Built from T78.111 with 7th character A (initial encounter).

Applies from T78 Adverse effects, not elsewhere classified

Excludes2 (not included here)

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

7th character note

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

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from T78.1 Other adverse food reactions, not elsewhere classified

Excludes1 (never code together)

• 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)

• 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

Applies from T78.111 Other adverse food reaction due to milk and dairy products with reactivity to baked milk

Excludes1 (never code together)

• Other adverse food reaction due to milk and dairy products with tolerance to baked milk (T78.110)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to T78.111A

Back-references to T78.111

• Type 1 Excludes: T78.110 Other adverse food reactions due to milk and dairy products with tolerance to baked milk ("Other adverse food reaction due to milk and dairy products with reactivity to baked milk (T78.111)")

Back-references to T78.1

• Type 2 Excludes: L27 Dermatitis due to substances taken internally ("adverse food reaction, except dermatitis (T78.0-T78.1)")

Back-references to T78

• Type 1 Excludes: T75 Other and unspecified effects of other external causes ("adverse effects NEC (T78.-)")

Diagnosis Index entries for T78.111A

• Allergy, allergic (reaction) (to) › dairy products › with › reactivity to baked milk
• Allergy, allergic (reaction) (to) › milk protein › adverse reaction NEC › with › reactivity to baked milk

Nearby codes

• T78.110 Other adverse food reactions due to milk and dairy products with tolerance to baked milk
• 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
• T78.111 Other adverse food reaction due to milk and dairy products with reactivity to baked milk
• T78.111A Other adverse food reaction due to milk and dairy products with reactivity to baked milk, initial encounter (this code)
• T78.111D Other adverse food reaction due to milk and dairy products with reactivity to baked milk, subsequent encounter
• T78.111S Other adverse food reaction due to milk and dairy products with reactivity to baked milk, sequela
• T78.119 Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified
• T78.119A Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, initial encounter
• T78.119D Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified, subsequent encounter