ICD-10 Diagnosis Code T78.1XXA

Oth adverse food reactions, not elsewhere classified, init

Diagnosis Code T78.1XXA

ICD-10: T78.1XXA
Short Description: Oth adverse food reactions, not elsewhere classified, init
Long Description: Other adverse food reactions, not elsewhere classified, initial encounter
This is the 2017 version of the ICD-10-CM diagnosis code T78.1XXA

Valid for Submission
The code T78.1XXA is valid for submission for HIPAA-covered transactions.

Code Classification
  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Other and unspecified effects of external causes (T66-T78)
      • Adverse effects, not elsewhere classified (T78)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code T78.1XXA is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)

  • OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITH MCC 922
  • OTHER INJURY, POISONING AND TOXIC EFFECT DIAGNOSES WITHOUT MCC 923

Information for Patients


Food Allergy

Food allergy is an abnormal response to a food triggered by your body's immune system.

In adults, the foods that most often trigger allergic reactions include fish, shellfish, peanuts, and tree nuts, such as walnuts. Problem foods for children can include eggs, milk, peanuts, tree nuts, soy, and wheat.

The allergic reaction may be mild. In rare cases it can cause a severe reaction called anaphylaxis. Symptoms of food allergy include

  • Itching or swelling in your mouth
  • Vomiting, diarrhea, or abdominal cramps and pain
  • Hives or eczema
  • Tightening of the throat and trouble breathing
  • Drop in blood pressure

Your health care provider may use a detailed history, elimination diet, and skin and blood tests to diagnose a food allergy.

When you have food allergies, you must be prepared to treat an accidental exposure. Wear a medical alert bracelet or necklace, and carry an auto-injector device containing epinephrine (adrenaline).

You can only prevent the symptoms of food allergy by avoiding the food. After you and your health care provider have identified the foods to which you are sensitive, you must remove them from your diet.

NIH: National Institute of Allergy and Infectious Diseases

  • Allergy testing - skin
  • Anaphylaxis
  • Food allergy


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