ICD-10 Diagnosis Code Z91.0

Allergy status, oth than to drugs and biological substances

Diagnosis Code Z91.0

ICD-10: Z91.0
Short Description: Allergy status, oth than to drugs and biological substances
Long Description: Allergy status, other than to drugs and biological substances
This is the 2017 version of the ICD-10-CM diagnosis code Z91.0

Code Classification
  • Factors influencing health status and contact with health services
    • Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
      • Personal risk factors, not elsewhere classified (Z91)

Information for Medical Professionals

Index of Diseases and Injuries
References found for the code Z91.0 in the Index of Diseases and Injuries:

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
  • Allergic rhinitis - self-care
  • Allergies
  • Allergies, asthma, and dust
  • Allergies, asthma, and molds
  • Allergy testing - skin
  • Angioedema
  • Antihistamines for allergies

[Read More]
Previous Code
Previous Code Z91
Next Code
Z91.01 Next Code