Current
T78 — Adverse effects, not elsewhere classified
Part of Chapter 19: Injury, poisoning and certain other consequences of external causes , block Other and unspecified effects of external causes (T66-T78) .
Official Notes
Excludes2
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
7th Character
A - initial encounter
7th Character
D - subsequent encounter
7th Character
S - sequela
Child Codes
- T78.0 Anaphylactic reaction due to food Has subcodes
- T78.1 Other adverse food reactions, not elsewhere classified Has subcodes
- T78.2 Anaphylactic shock, unspecified Has subcodes
- T78.3 Angioneurotic edema Has subcodes
- T78.4 Other and unspecified allergy Has subcodes
- T78.8 Other adverse effects, not elsewhere classified Has subcodes
Referenced By
Official notes on these codes cite T78.
FY 2027 effective October 1, 2026 · CDC NCHS and CMS