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).

What cannot be coded together with D82.9?

D82.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D82.9 (D82) and apply to it just the same.

D82.9

D82.9 — Immunodeficiency associated with major defect, unspecified

Billable / specific codeICD-10-CM

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.

Excludes1 inherited from the categories above D82.9

These are not written on D82.9, but they bind it: a note on a category applies to every code beneath it. Billing D82.9 with anything listed here is a denial.

Written on D82 — Immunodeficiency associated with other major defects

ataxia telangiectasia [Louis-Bar] (G11.3)

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

Code history

D82.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

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).
What cannot be coded together with D82.9?: D82.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above D82.9 (D82) and apply to it just the same.