T78.09Anaphylactic reaction due to other food products

T78.09 is the ICD-10-CM diagnosis code for anaphylactic reaction due to other food products. It belongs to category T78 (adverse effects, not elsewhere classified), block T66-T78 (other and unspecified effects of external causes) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T78.0, choose T78.09 (other food products) only when documentation doesn't support a more specific option: unspecified food (T78.00), peanuts (T78.01), shellfish (crustaceans) (T78.02), other fish (T78.03), fruits and vegetables (T78.04), tree nuts and seeds (T78.05), additives (T78.06), milk and dairy products (T78.07) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.