ICD-10 Code D84.9

Immunodeficiency, unspecified

Diagnosis Code D84.9

ICD-10: D84.9
Short Description: Immunodeficiency, unspecified
Long Description: Immunodeficiency, unspecified
Version 2019 of the ICD-10-CM diagnosis code D84.9

Valid for Submission
The code D84.9 is valid for submission for HIPAA-covered transactions.

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)
Version 2019 Billable Code

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code D84.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9
  • 279.3 - Immunity deficiency NOS (Approximate Flag)

  • 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
References found for the code D84.9 in the Index to Diseases and Injuries:

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)

[Read 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.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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