T78.3

Angioneurotic edema

Header / non-billable

Choose the additional character

T78.3 needs more characters to be billable. Pick the specific code below.

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · T78.3
Excludes 1

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

Synonyms

Allergic angioedema Giant urticaria Quincke's edema

Inherited from T78Adverse effects, not elsewhere classified
Excludes 2

complications of surgical and medical care NEC (T80-T88)

7th character

The appropriate 7th character is to be added to each code from category T78

Valid 7th characters and their meanings
CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela
Inherited from chapter 19Injury, poisoning and certain other consequences of external causes
Excludes 2

birth trauma (P10-P15) obstetric trauma (O70-O71)

Use additional

code to identify any retained foreign body, if applicable (Z18.-)

Note

(T07-T88) Injury, poisoning and certain other consequences of external causes (T07-T88) (T20-T32) Burns and corrosions (T20-T32) Includes: burns (thermal) from electrical heating appliances burns (thermal) from electricity burns (thermal) from flame burns (thermal) from friction burns (thermal) from hot air and hot gases burns (thermal) from hot objects burns (thermal) from lightning burns (thermal) from radiation chemical burn [corrosion] (external) (internal) scalds Excludes2: erythema [dermatitis] ab igne (L59.0) radiation-related disorders of the skin and subcutaneous tissue (L55-L59) sunburn (L55.-)

Official Guidelines for T78.3

FY 2026 ›
I.C.19Chapter-specific guidanceChapter 19: Injury, poisoning, and certain other consequences of external causes (S00-T88)

Subsections

Find T78.3 in the alphabetic index

18 index paths lead to this code