2021 ICD-10-CM Code D84.8

Other specified immunodeficiencies

Version 2021
Replaced Code
Non-Billable Code

Not Valid for Submission

D84.8 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other specified immunodeficiencies. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:D84.8
Short Description:Other specified immunodeficiencies
Long Description:Other specified immunodeficiencies

Code Classification

Specific Coding for Other specified immunodeficiencies

Header codes like D84.8 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for other specified immunodeficiencies:

  • D84.81 - Immunodeficiency due to conditions classified elsewhere
  • D84.82 - Immunodeficiency due to drugs and external causes
  • D84.821 - Immunodeficiency due to drugs
  • D84.822 - Immunodeficiency due to external causes
  • D84.89 - Other immunodeficiencies

Replaced Code

This code was replaced in the 2021 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This code was replaced for the FY 2021 (October 1, 2020 - September 30, 2021).


  • D84.81 - Immunodeficiency due to conditions classified elsewhere
  • D84.821 - Immunodeficiency due to drugs
  • D84.822 - Immunodeficiency due to external causes
  • D84.89 - Other immunodeficiencies

Convert D84.8 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code D84.8 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Information for Patients


Immune System and Disorders

Your immune system is a complex network of cells, tissues, and organs that work together to defend against germs. It helps your body to recognize these "foreign" invaders. Then its job is to keep them out, or if it can't, to find and destroy them.

If your immune system cannot do its job, the results can be serious. Disorders of the immune system include

NIH: National Institute of Allergy and Infectious Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2021 - Code Deleted, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)