D82.9 — Immunodeficiency associated with major defect, unspecified
D82.9 is a billable, specific ICD-10-CM code for immunodeficiency associated with major defect, unspecified. It is valid for submission on a claim.
Risk adjustment
D82.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
D82.9 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56718Billing and Coding: Intravenous Immunoglobulin (IVIG)
- A58963Billing and Coding: Multiplex Gastrointestinal Pathogen Panel (GPP) Tests for Acute Gastroenteritis (AGE)
How D82.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to D82.9.
- Immunodeficiency›with›major defect
Related codes at this level
Codes that share D82. If D82.9 is not quite right, the correct code is usually one of these.
Questions about D82.9
- Is D82.9 a billable ICD-10-CM code?
- Yes. D82.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does D82.9 sit in the tabular list?
- Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89), in the block Certain disorders involving the immune mechanism (D80-D89).