T78.3 ICD-10-CM Code: Angioneurotic edema
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
T78.3Angioneurotic edema
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where T78.3 sits
- 1
Chapter 19
Injury, poisoning and certain other consequences of external causes (S00-T88)
- 2
Section
Other and unspecified effects of external causes (T66-T78)
- 3
Category T78
Adverse effects, not elsewhere classified
- 4
Code T78.3
Angioneurotic edema
More specific choices
Codes under T78.3
T78.3 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
- Allergic angioedema
- Giant urticaria
- Quincke's edema
Code first
No “code first” instruction is listed for T78.3.
Use additional code
No “use additional code” instruction is listed for T78.3.
Excludes1
Conditions that should not be reported together with this code.
- serum urticaria (T80.6-)
- urticaria (L50.-)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for T78.3.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code T78.3 mean?
T78.3 is the FY 2027 U.S. ICD-10-CM code for “Angioneurotic edema.”
Is T78.3 a billable or specific ICD-10-CM code?
No. T78.3 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is T78.3 located in ICD-10-CM?
T78.3 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Other and unspecified effects of external causes (T66-T78) (T66–T78), under category T78, Adverse effects, not elsewhere classified.
What coding notes are listed for T78.3?
Its listed inclusion terms are Allergic angioedema; Giant urticaria; Quincke's edema. No code-first instruction is listed. Excludes1 notes: serum urticaria (T80.6-); urticaria (L50.-). No Excludes2 note is listed.
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