T78.3 Angioneurotic edema

The ICD-10-CM code for Angioneurotic edema is T78.3 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

19: Injury, poisoning and certain other consequences of external causes (S00-T88)

Section

T66-T78: Other and unspecified effects of external causes (T66-T78)

Category T78

35 codes (27 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to T78.3:

• Quincke's disease or edema
• Angioedema (allergic) (any site) (with urticaria)
• Bannister's disease
• Angioneurotic edema (allergic) (any site) (with urticaria)
• Disease, diseased › Bannister's
• Allergy, allergic (reaction) (to) › angioneurotic edema
• Edema, edematous (infectious) (pitting) (toxic) › allergic
• Edema, edematous (infectious) (pitting) (toxic) › angioneurotic (allergic) (any site) (with urticaria)

Inclusion Terms

• Allergic angioedema
• Giant urticaria
• Quincke's edema

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool