ICD-10 Diagnosis Code T78.40XA

Allergy, unspecified, initial encounter

Diagnosis Code T78.40XA

ICD-10: T78.40XA
Short Description: Allergy, unspecified, initial encounter
Long Description: Allergy, unspecified, initial encounter
This is the 2017 version of the ICD-10-CM diagnosis code T78.40XA

Valid for Submission
The code T78.40XA 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 T78.40XA is grouped in the following Diagnostic Related Group(s) (MS-DRG V34.0)

  • 915 - ALLERGIC REACTIONS WITH MCC
  • 916 - ALLERGIC REACTIONS WITHOUT MCC

Synonyms
  • Acute allergic reaction
  • Acute laryngotracheitis
  • Adverse effect, caused by correct medicinal substance properly administered
  • Adverse effect, caused by correct medicinal substance properly administered
  • Adverse reaction caused by oil
  • Allergic bronchitis
  • Allergic condition
  • Allergic disorder by allergen type
  • Allergic disorder by body site affected
  • Allergic disorder of digestive system
  • Allergic disorder of respiratory system
  • Allergic disposition
  • Allergic encephalitis
  • Allergic facies
  • Allergic gingival disease
  • Allergic neuropathy
  • Allergic otitis externa
  • Allergic reaction
  • Allergic reaction caused by adhesive
  • Allergic reaction caused by animal
  • Allergic reaction caused by animal
  • Allergic reaction caused by bee sting
  • Allergic reaction caused by bite and/or sting
  • Allergic reaction caused by bite and/or sting
  • Allergic reaction caused by chemical
  • Allergic reaction caused by colophony
  • Allergic reaction caused by cosmetics
  • Allergic reaction caused by detergent
  • Allergic reaction caused by drug
  • Allergic reaction caused by drug
  • Allergic reaction caused by dye
  • Allergic reaction caused by hair dye
  • Allergic reaction caused by insect bite
  • Allergic reaction caused by insect venom
  • Allergic reaction caused by insect venom
  • Allergic reaction caused by nickel
  • Allergic reaction caused by oil
  • Allergic reaction caused by platinum
  • Allergic reaction caused by substance
  • Allergic reaction caused by venom
  • Allergic reaction caused by wasp sting
  • Allergic reaction, caused by correct medicinal substance properly administered
  • Allergic sensitization
  • Allergic vaginitis
  • Allergy skin test positive
  • Allergy test positive
  • Allergy to biocide in cosmetic
  • Allergy to substance
  • Allopurinol hypersensitivity syndrome
  • Angry back syndrome
  • Atopic reaction
  • Cell-mediated immune reaction
  • Chronic allergic otitis externa
  • Chronic non-infective otitis externa
  • Chronic otitis externa
  • Complication of diagnostic procedure
  • Complication of patch testing
  • Contact hypersensitivity reaction
  • Contrast media pseudoallergy
  • Croup
  • Cutaneous hypersensitivity
  • Cutis laxa following hypersensitivity reaction
  • Cutis laxa, acquired type
  • Drug reaction with eosinophilia and systemic symptoms
  • Drug reaction with eosinophilia and systemic symptoms caused by strontium ranelate
  • Hypersensitivity condition
  • Hypersensitivity disposition
  • Hypersensitivity finding
  • Hypersensitivity finding
  • Hypersensitivity finding
  • Hypersensitivity reaction
  • Hypersensitivity reaction mediated by antibody
  • Hypersensitivity reaction mediated by immune complex
  • Hypersensitivity reaction with blocking antibody
  • Hypersensitivity reaction without blocking antibody
  • Idiosyncrasy caused by correct medicinal substance properly administered
  • Idiosyncratic drug effect
  • Immune hypersensitivity reaction by mechanism
  • Injection site hypersensitivity
  • Laryngotracheobronchitis
  • Losartan pseudoallergy
  • Myocarditis due to hypersensitivity state
  • Pain provoked by allergen
  • Perindopril pseudoallergy
  • Pseudoallergic condition
  • Pseudoallergic disposition
  • Pseudoallergic reaction
  • Pseudoallergy to angiotensin II receptor antagonist
  • Pseudoallergy to substance
  • Pseudoallergy to sulfite based food preservative
  • Quinapril pseudoallergy
  • Rampiril pseudoallergy
  • Recurrent allergic croup
  • Recurrent croup
  • Skin: type 3 delayed reaction
  • Sodium thiosulfate pseudoallergy
  • Type 1 hypersensitivity response
  • Type 1 skin hypersensitivity reaction
  • Type 4 hypersensitivity response
  • Vaginitis associated with another disorder

Information for Patients


Allergy

Also called: Hypersensitivity

An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are

  • Pollen
  • Dust mites
  • Mold spores
  • Pet dander
  • Food
  • Insect stings
  • Medicines

Normally, your immune system fights germs. It is your body's defense system. In most allergic reactions, however, it is responding to a false alarm. Genes and the environment probably both play a role.

Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes, swelling, or asthma. Allergies can range from minor to severe. Anaphylaxis is a severe reaction that can be life-threatening. Doctors use skin and blood tests to diagnose allergies. Treatments include medicines, allergy shots, and avoiding the substances that cause the reactions.

NIH: National Institute of Allergy and Infectious Diseases

  • Allergic reactions (Medical Encyclopedia)
  • Allergic rhinitis - self-care (Medical Encyclopedia)
  • Allergies (Medical Encyclopedia)
  • Allergies, asthma, and dust (Medical Encyclopedia)
  • Allergies, asthma, and molds (Medical Encyclopedia)
  • Allergy testing - skin (Medical Encyclopedia)
  • Angioedema (Medical Encyclopedia)
  • Antihistamines for allergies (Medical Encyclopedia)


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