D89.84

D89.84: IgG4-related disease

Billable / specific codeICD-10-CM

D89.84 is a billable, specific ICD-10-CM code for igg4-related disease. It is valid for submission on a claim.

Check D89.84 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Immunoglobulin G4-related disease

Excludes1 inherited from the categories above D89.84

A category’s note binds every code beneath it.

Written on D89: Other disorders involving the immune mechanism, not elsewhere classified

hyperglobulinemia NOS (R77.1)
monoclonal gammopathy (of undetermined significance) (D47.2)

Excludes2 inherited from the categories above D89.84

Not part of this code, but both may be coded when both are present.

Written on D89: Other disorders involving the immune mechanism, not elsewhere classified

transplant failure and rejection (T86.-)

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. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

D89.84 is named in 6 Medicare coverage policies: 6 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A55717Billing and Coding: Lab: Flow Cytometry
A56380Billing and Coding: Rituximab
A56718Billing and Coding: Intravenous Immunoglobulin (IVIG)
A56779Billing and Coding: Intravenous Immune Globulin

Alphabetic index entries that lead here

Disease, diseased›IgG4-related

Code history

Unchanged in every release from FY2024 to FY2027.