T78.3

ICD-10Non-billable category

Angioneurotic edema

Official ICD-10-CM descriptor (FY2026)

Angioneurotic edema

T78.3 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

  • Allergic angioedema
  • Giant urticaria
  • Quincke's edema

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • serum urticaria (T80.6-)
  • urticaria (L50.-)

Related codes in T78

Where this code sits

Parent code
T78

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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