D89.84 — IgG4-related disease
D89.84 is a billable, specific ICD-10-CM code for igg4-related disease. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Immunoglobulin G4-related disease
Risk adjustment
D89.84 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 115 Specified Immunodeficiencies and White Blood Cell Disorders0.565 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
D89.84 is named in 7 Medicare coverage policies — 7 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A55717Billing and Coding: Lab: Flow Cytometry
- A56380Billing and Coding: Rituximab
- A56718Billing and Coding: Intravenous Immunoglobulin (IVIG)
- A56779Billing and Coding: Intravenous Immune Globulin
How D89.84 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 D89.84.
- Disease, diseased›IgG4-related
Related codes at this level
Codes that share D89.8. If D89.84 is not quite right, the correct code is usually one of these.
Questions about D89.84
- Is D89.84 a billable ICD-10-CM code?
- Yes. D89.84 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does D89.84 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).