ICD-10-CM 2027
ICD-10 code for Angioedema
From the official ICD-10-CM alphabetic index entry “Angioedema (allergic) (any site) (with urticaria)”. Page updated September 29, 2026.
About coding Angioedema
The ICD-10-CM code for Angioedema is T78.3 (Angioneurotic edema). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on T78.3.
Within T78 (adverse effects, not elsewhere classified), T78.3 is specifically for Angioneurotic edema. Related codes cover anaphylactic reaction due to food (T78.0), other adverse food reactions, not elsewhere classified (T78.1), anaphylactic shock, unspecified (T78.2), other and unspecified allergy (T78.4) and other adverse effects, not elsewhere classified (T78.8).
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.
Don't report T78.3 together with the conditions in its Excludes1 note: serum urticaria (T80.6-) and urticaria (L50.-).
More specific Angioedema codes (official index)
Don't confuse with (Excludes1 for T78.3)
Common questions about Angioedema ICD-10 codes
What is the ICD-10 code for Angioedema?
- T78.3 — Angioneurotic edema (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: D72.118, D84.1.
What is the ICD-10 code for hereditary angioedema?
- D84.1 — Defects in the complement system.
Is T78.3 billable?
- No. T78.3 is a header code. Report one of its more specific subcodes instead.