ICD-10 Diagnosis Code T78.49XA

Other allergy, initial encounter

Diagnosis Code T78.49XA

ICD-10: T78.49XA
Short Description: Other allergy, initial encounter
Long Description: Other allergy, initial encounter
This is the 2018 version of the ICD-10-CM diagnosis code T78.49XA

Valid for Submission
The code T78.49XA 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 T78.49XA is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Adverse reaction to food additive
  • Allergic gingival disease
  • Allergic gingivitis
  • Allergic reaction caused by animal
  • Allergic reaction caused by bite and/or sting
  • Allergic reaction caused by chemical
  • Allergic reaction caused by cosmetics
  • Allergic reaction caused by drug
  • Allergic reaction caused by dye
  • Allergic reaction caused by flour dust
  • Allergic reaction caused by insect venom
  • Allergic reaction caused by plant, except food
  • Allergic reaction caused by radiocontrast media
  • Allergic reaction caused by tattoo ink
  • Allergic reaction caused by venom
  • Allergic sensitization
  • Allergic sensitization caused by patch test
  • Allergy to gauze
  • Allosensitization
  • Angiotensin-converting-enzyme inhibitor pseudoallergy
  • Arthropathy associated with a hypersensitivity reaction
  • Atopic immunoglobulin E-mediated allergic disorder
  • Captopril pseudoallergy
  • Cell-mediated cytotoxic disorder
  • Cell-mediated cytotoxic reaction
  • Cell-mediated immune reaction
  • Cilazapril pseudoallergy
  • Complication of diagnostic procedure
  • Complication of patch testing
  • Contact hypersensitivity
  • Contrast media adverse reaction
  • Delayed hypersensitivity disorder
  • Dextran pseudoallergy
  • Drug pseudoallergy
  • Enalapril pseudoallergy
  • Environmental allergy
  • Fosinopril pseudoallergy
  • Hetastarch pseudoallergy
  • Hypersensitivity disorder mediated by immune complex
  • Immune hypersensitivity disorder by mechanism
  • Immune hypersensitivity reaction by mechanism
  • Immune hypersensitivity reaction by mechanism
  • Immunoglobulin E-mediated allergic disorder
  • Jarisch Herxheimer reaction
  • Jones-Mote type hypersensitivity
  • Lisinopril pseudoallergy
  • Multiple environmental allergies
  • Nonatopic immunoglobulin E-mediated allergic disorder
  • Non-immunoglobulin E-mediated allergic disorder
  • Non-immunoglobulin E-mediated atopic disorder
  • Pentastarch pseudoallergy
  • Pericarditis related to hypersensitivity AND/OR autoimmunity
  • Phacoanaphylaxis
  • Platinosis
  • Pseudoallergic reaction caused by sulfite
  • Pseudoallergy to aspartame
  • Radiopharmaceutical adverse reaction
  • Trandolapril pseudoallergy

Information for Patients


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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