2026 ICD-10-CM Diagnosis Code D89.0Polyclonal hypergammaglobulinemia

ICD-10-CM Codes›D50–D89›D80-D89›D89

ICD-10-CM D89.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D89.0 is a billable ICD-10-CM diagnosis code for polyclonal hypergammaglobulinemia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 814 through 816. Coders also document this condition as benign primary hypergammaglobulinemic purpura. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Immunity disorders.

D89.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 99 for payment year 2026.

Code Identity

ICD-10-CM Code
D89.0
Billable Status
Yes — Valid for Submission
Code Describes
Polyclonal hypergammaglobulinemia
Short Description
Polyclonal hypergammaglobulinemia
Same as the full description in the CMS dataset.
Parent Code
D89
Other disorders involving the immune mechanism, not elsewhere classified

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD80-D89Certain disorders involving the immune mechanism
CategoryD89Other disorders involving the immune mechanism, not elsewhere classified
This CodeD89.0Polyclonal hypergammaglobulinemia

Medicare Risk Adjustment (HCC)Billing

D89.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 99 — Immune Disorders
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2026 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign primary hypergammaglobulinemic purpura
  • Hyperglobulinemic purpura
  • Polyclonal gammopathy
  • Polyclonal hypergammaglobulinemia
  • Waldenstrom's hypergammaglobulinemic purpura

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Benign hypergammaglobulinemic purpura
  • Polyclonal gammopathy NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR BLD008
Immunity disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Lymphadenopathy with Polyclonal Hypergammaglobulinemia|Lymphoadenopathy w/ polyclonal|Lymphoadenopathy with polyclonal hypergammaglobulinemia

    a finding indicating the presence of enlarged lymph nodes and associated polyclonal hypergammaglobulinemia.

  • Polyclonal Hypergammaglobulinemia

    a laboratory test result indicating abnormally high proliferation of gamma globulins in the blood originating from multiple cell lines.

Patient EducationClinical

Immune System and Disorders

Your immune system is a complex network of cells, tissues, and organs. Together they help the body fight infections and other diseases.

The full article covers:

  • What is the immune system?
  • What are the parts of the immune system?
  • How does the immune system work?
  • What are the types of immunity?
  • What can go wrong with the immune system?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D89.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
273.0 Polyclon hypergammaglobu
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D89.0Overview

What is the ICD-10 code for polyclonal hypergammaglobulinemia?

The ICD-10-CM code for polyclonal hypergammaglobulinemia is D89.0 (sometimes written as D890). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is D89.0 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report polyclonal hypergammaglobulinemia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D89.0 group to?

When polyclonal hypergammaglobulinemia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 814, 815, 816, with relative weights from 0.6320 to 2.1267 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D89.0?

Under the General Equivalence Mappings, polyclonal hypergammaglobulinemia converts to ICD-9-CM 273.0 (polyclon hypergammaglobu). The mapping is a direct match.

Does D89.0 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: D89.0 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 99 (Immune Disorders).