T78.05Anaphylactic reaction due to tree nuts and seeds

T78.05 is the ICD-10-CM diagnosis code for anaphylactic reaction due to tree nuts and seeds. 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 (anaphylactic reaction due to food), T78.05 is specifically for anaphylactic reaction due to tree nuts and seeds. Related codes cover unspecified food (T78.00), peanuts (T78.01), shellfish (crustaceans) (T78.02), other fish (T78.03), fruits and vegetables (T78.04), additives (T78.06), milk and dairy products (T78.07), eggs (T78.08) 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.

The conditions in its Excludes2 note aren't part of T78.05, but may be coded alongside it if the patient has both: anaphylactic reaction due to peanuts (T78.01).

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