ICD-10-CM Code Z91.0

Allergy status, other than to drugs and biological substances

Version 2020 Non-Billable Code

Not Valid for Submission

Z91.0 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of allergy status, other than to drugs and biological substances. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

Short Description:Allergy status, oth than to drugs and biological substances
Long Description:Allergy status, other than to drugs and biological substances

Consider the following ICD-10 codes with a higher level of specificity:

  • Z91.01 - Food allergy status
  • Z91.010 - Allergy to peanuts
  • Z91.011 - Allergy to milk products
  • Z91.012 - Allergy to eggs
  • Z91.013 - Allergy to seafood
  • Z91.018 - Allergy to other foods
  • Z91.02 - Food additives allergy status
  • Z91.03 - Insect allergy status
  • Z91.030 - Bee allergy status
  • Z91.038 - Other insect allergy status
  • Z91.04 - Nonmedicinal substance allergy status
  • Z91.040 - Latex allergy status
  • Z91.041 - Radiographic dye allergy status
  • Z91.048 - Other nonmedicinal substance allergy status
  • Z91.09 - Other allergy status, other than to drugs and biological substances

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code Z91.0:

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Allergy status to drugs, medicaments, and biological substances Z88

Code Classification

  • Factors influencing health status and contact with health services (Z00–Z99)
    • 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)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


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.

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