T78.3
Angioneurotic edema
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 6
T78.3code
Inclusion terms
- Allergic angioedema
- Giant urticaria
- Quincke's edema
S00-T88chapter
Notes
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 9
- Edema, edematous (infectious) (pitting) (toxic) R60.9
- Allergy, allergic (reaction) (to) T78.40
- angioneurotic edema T78.3
- Angioedema (allergic) (any site) (with urticaria) T78.3
- Angioneurotic edema (allergic) (any site) (with urticaria) T78.3
- Disease, diseased — see also Syndrome
- Bannister's T78.3
- Bannister's disease T78.3
- Urticaria L50.9
- Giant
- urticaria T78.3
- Quincke's disease or edema T78.3
Alongside this code 5 same parent — T78
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.