T78.49 Other allergy

Non-billable ICD-10-CM code.

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 T78.4 Other and unspecified allergy

Excludes1 (never code together)

• specified types of allergic reaction such as:
• allergic diarrhea (K52.29)
• allergic gastroenteritis and colitis (K52.29)
• dermatitis (L23-L25, L27.-)
• food protein-induced enterocolitis syndrome (K52.21)
• food protein-induced enteropathy (K52.22)
• hay fever (J30.1)

Code annotations containing back-references to T78.49

Back-references to T78

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

Diagnosis Index entries for T78.49

• Allergy, allergic (reaction) (to) › specific NEC
• Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › in (due to) › hypersensitivity reaction NEC

Nearby codes

• T78.40XS Allergy, unspecified, sequela
• T78.41 Arthus phenomenon
• T78.41XA Arthus phenomenon, initial encounter
• T78.41XD Arthus phenomenon, subsequent encounter
• T78.41XS Arthus phenomenon, sequela
• T78.49 Other allergy (this code)
• T78.49XA Other allergy, initial encounter
• T78.49XD Other allergy, subsequent encounter
• T78.49XS Other allergy, sequela
• T78.8 Other adverse effects, not elsewhere classified
• T78.8XXA Other adverse effects, not elsewhere classified, initial encounter