ICD-10 CM Code T78.40
T78.40
Allergy, unspecified
Inclusion Term
- Allergic reaction NOS
- Hypersensitivity NOS
Excludes Type 1
- 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)
Excludes Type 2
- complications of surgical and medical care NEC (T80-T88)
7th Character
- The appropriate 7th character is to be added to each code from category T78
- A - initial encounter
- D - subsequent encounter
- S - sequela
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