2025 ICD-10-CM code T78.3
(Active) Effective Date: N/A Revision Date: N/A Deletion Date: N/A Injury, poisoning and certain other consequences of external causes - Other and unspecified effects of external causes Chapter 20: External causes of morbidity Feed
Angioneurotic edema, also known as allergic angioedema, is a condition characterized by swelling of the skin and mucous membranes.
Medical necessity for the diagnosis and management of angioneurotic edema is established by the presence of symptoms consistent with the diagnosis, such as swelling and potential airway compromise.Treatment is medically necessary to alleviate symptoms and prevent life-threatening complications.
Diagnosis and management of angioneurotic edema, including assessment of severity, airway management if needed, treatment of the underlying cause (if identified), and supportive care.
- Chapter 20: External causes of morbidity
- Injury, poisoning and certain other consequences of external causes > Other and unspecified effects of external causes
In simple words: Angioneurotic edema is swelling under the skin and in the lining of the body. It often happens because of allergies but can also be from other causes. The swelling may be on the face, lips, tongue, or throat and sometimes makes it hard to breathe. It can range from mild to very serious.
Angioneurotic edema (T78.3) is a medical condition characterized by swelling beneath the skin and mucous membranes.It's often caused by allergic reactions, but can also have hereditary or idiopathic causes.The swelling typically involves the face, lips, tongue, and throat, potentially causing respiratory distress. The severity can range from mild to life-threatening.This code should be used to classify cases of angioneurotic edema, specifying the cause using an additional external cause code from Chapter 20, if applicable.A retained foreign body, if present, should be coded with Z18.-
Example 1: A patient presents to the emergency department with sudden onset of facial swelling, lip swelling, and difficulty breathing.After assessment, the patient is diagnosed with angioneurotic edema likely due to a food allergy.Treatment includes epinephrine injection and observation., A patient with a known history of hereditary angioedema experiences an episode of abdominal pain and swelling.The patient is diagnosed with angioneurotic edema.Treatment is supportive, focusing on pain management and monitoring for potential respiratory compromise., A patient develops swelling around the eyes and lips after receiving an injection.The patient is diagnosed with angioneurotic edema, likely a drug reaction.Treatment involves antihistamines and corticosteroids.
Detailed history and physical examination documenting the onset, location, and severity of swelling.Documentation of any associated symptoms such as respiratory distress, abdominal pain, or urticaria.Results of allergy testing (if performed).Detailed description of treatment administered.Diagnosis of the underlying cause, if identified.
** Angioneurotic edema can be a serious condition.Early diagnosis and appropriate management are critical to prevent complications.
- Payment Status: Active
- Specialties:Allergy and Immunology, Emergency Medicine, Otolaryngology
- Place of Service:Emergency Room - Hospital, Office, Inpatient Hospital