D84.9Billable
Immunodeficiency, unspecified
- Chapter
- 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- Category
- D84
- Effective date
- October 1, 2026
Related codes in category D84
D84Other immunodeficienciesD84.0Lymphocyte function antigen-1 [LFA-1] defectYesD84.1Defects in the complement systemYesD84.8Other specified immunodeficienciesD84.81Immunodeficiency due to conditions classified elsewhereYesD84.82Immunodeficiency due to drugs and external causesD84.821Immunodeficiency due to drugsYesD84.822Immunodeficiency due to external causesYesD84.89Other immunodeficienciesYes
Frequently asked questions
What is ICD-10 code D84.9?
D84.9 is an ICD-10-CM diagnosis code for Immunodeficiency, unspecified.
Is D84.9 a billable code?
Yes. D84.9 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is D84.9 in?
D84.9 falls under Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
When did D84.9 become effective?
D84.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to D84.9?
D84.9 belongs to category D84, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.