2026 ICD-10-CM Diagnosis Code N02.B9Other recurrent and persistent immunoglobulin A nephropathy

ICD-10-CM Codes›N00–N99›N00-N08›N02

ICD-10-CM N02.B9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N02.B9 is a billable ICD-10-CM diagnosis code for other recurrent and persistent immunoglobulin A nephropathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. Coders also document this condition as IgA nephropathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nephritis; nephrosis; renal sclerosis.

Code Identity

ICD-10-CM Code
N02.B9
Billable Status
Yes — Valid for Submission
Code Describes
Other recurrent and persistent immunoglobulin A nephropathy
Short Description
Other recurrent and persistent immunoglobulin A nephropathy
Same as the full description in the CMS dataset.
Parent Code
N02.B
Recurrent and persistent immunoglobulin A nephropathy

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN00-N08Glomerular diseases
CategoryN02Recurrent and persistent hematuria
This CodeN02.B9Other recurrent and persistent immunoglobulin A nephropathy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • IgA nephropathy
  • Recurrent immunoglobulin A nephropathy
  • Recurrent proliferative glomerulonephritis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Nephropathy
      • IgA
        • proliferative NEC
    • Nephropathy
      • IgA
        • specified pathology NEC

Clinical ClassificationClinical

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

CCSR GEN001
Nephritis; nephrosis; renal sclerosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement N02.B9 replaces the following previously assigned code(s):

  • N02.8 - Recurrent and persistent hematuria w oth morphologic changes
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N02.B9Overview

Is N02.B9 (Recurrent and persistent immunoglobulin A nephropathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other recurrent and persistent immunoglobulin A nephropathy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N02.B9 group to?

When other recurrent and persistent immunoglobulin A nephropathy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.