ICD-10 Code D84.9

Immunodeficiency, unspecified

Version 2019 Billable Code

Valid for Submission

D84.9 is a billable code used to specify a medical diagnosis of immunodeficiency, unspecified. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

ICD-10: D84.9
Short Description:Immunodeficiency, unspecified
Long Description:Immunodeficiency, unspecified

Code Classification

  • Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50–D89)
    • Certain disorders involving the immune mechanism (D80-D89)
      • Other immunodeficiencies (D84)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated 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

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code D84.9 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 814 - RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH MCC
  • 815 - RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH CC
  • 816 - RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITHOUT CC/MCC

Convert D84.9 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 279.3 - Immunity deficiency NOS (Approximate Flag)

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Adult-onset immunodeficiency
  • Age-related immunodeficiency
  • Anhidrotic ectodermal dysplasia with immune deficiency
  • Centromeric instability of chromosomes 1,9 and 16 and immunodeficiency
  • Complication of chemotherapy
  • Congenital anomaly of endocrine gonad
  • Congenital anomaly of endocrine ovary
  • Congenital immunodeficiency disease
  • Drug-induced immunodeficiency
  • Immunodeficiency caused by long term therapeutic use of drug
  • Immunodeficiency disorder
  • Immunodeficiency secondary to chemotherapy
  • Immunodeficiency secondary to corticosteroid
  • Immunodeficiency secondary to neoplasm
  • Immunodeficiency secondary to radiation therapy
  • Immunodeficiency secondary to trauma
  • Immunodeficiency with thymoma
  • Immunosuppression
  • Laron syndrome with immunodeficiency
  • Lung fibrosis, immunodeficiency, 46,XX gonadal dysgenesis syndrome
  • Microcephaly, normal intelligence and immunodeficiency
  • Oral hairy leukoplakia associated with immunodeficiency
  • Ovarian dysgenesis
  • Patient immunocompromised
  • Patient immunosuppressed
  • Primary immune deficiency disorder
  • Pure gonadal dysgenesis
  • Pure gonadal dysgenesis 46,XX
  • Secondary immune deficiency disorder

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code D84.9 are found in the index:


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

  • Allergy and asthma - immune responses to substances that are usually not harmful
  • Immune deficiency diseases - disorders in which the immune system is missing one or more of its parts
  • Autoimmune diseases - diseases causing your immune system to attack your own body's cells and tissues by mistake

NIH: National Institute of Allergy and Infectious Diseases

  • Agammaglobulinemia (Medical Encyclopedia)
  • Aging changes in immunity (Medical Encyclopedia)
  • Chronic granulomatous disease (Medical Encyclopedia)
  • Graft-versus-host disease (Medical Encyclopedia)
  • Histiocytosis (Medical Encyclopedia)
  • Hyperimmunoglobulin E syndrome (Medical Encyclopedia)
  • Immune response (Medical Encyclopedia)
  • Immunodeficiency disorders (Medical Encyclopedia)
  • Selective deficiency of IgA (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
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.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.