2026 ICD-10-CM Diagnosis Code M31.30Wegener's granulomatosis without renal involvement

ICD-10-CM Codes›M00–M99›M30-M36›M31

ICD-10-CM M31.30
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M31.30 is a billable ICD-10-CM diagnosis code for Wegener's granulomatosis without renal involvement. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 542 through 544. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Systemic lupus erythematosus and connective tissue disorders and Vasculitis.

Code Identity

ICD-10-CM Code
M31.30
Billable Status
Yes — Valid for Submission
Code Describes
Wegener's granulomatosis without renal involvement
Short Description
Wegener's granulomatosis without renal involvement
Same as the full description in the CMS dataset.
Parent Code
M31.3
Wegener's granulomatosis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM30-M36Systemic connective tissue disorders
CategoryM31Other necrotizing vasculopathies
This CodeM31.30Wegener's granulomatosis without renal involvement

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bronchocentric granulomatosis
  • Granulomatosis with polyangiitis
  • Granulomatosis with polyangiitis of gingiva
  • Granulomatosis with polyangiitis of larynx
  • Granulomatosis with polyangiitis of nose
  • Granulomatosis with polyangiitis of orbit
  • Granulomatosis with polyangiitis with multisystem involvement
  • Immune-mediated scleritis
  • Limited granulomatosis with polyangiitis
  • Meningitis due to granulomatosis with polyangiitis
  • Necrotizing sarcoid granulomatosis
  • Scleritis due to granulomatosis with polyangiitis
  • Vasculitis due to systemic disease

Tabular List NotesGuidance

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

Inclusion Terms

  • Wegener's granulomatosis NOS

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.

    • Granulomatosis
      • necrotizing, respiratory
    • Granulomatosis
      • Wegener's
    • Syndrome
      • Wegener's
    • Syndrome
      • Wegener's
        • with
          • lung involvement
    • Wegener's granulomatosis or syndrome
    • Wegener's granulomatosis or syndrome
      • with
        • lung involvement

Clinical ClassificationClinical

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

CCSR MUS024
Systemic lupus erythematosus and connective tissue disorders
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR CIR037
Vasculitis
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Granulomatosis with Polyangiitis

    a multisystemic disease of a complex genetic background. it is characterized by inflammation of the blood vessels (vasculitis) leading to damage in any number of organs. the common features include granulomatous inflammation of the respiratory tract and kidneys. most patients have measurable autoantibodies (antineutrophil cytoplasmic antibodies) against myeloblastin.

Patient EducationClinical

Granulomatosis with Polyangiitis

Granulomatosis with polyangiitis (GPA), previously known as Wegener's granulomatosis, is a rare disease. It is a type of vasculitis, or inflammation of the blood vessels. The inflammation limits the flow of blood to important organs, causing damage.

Read the full article at MedlinePlus

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

Convert M31.30 to ICD-9-CMHistory

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

ICD-9-CM
446.4 Wegener's granulomatosis
Approximate The match is approximate rather than exact.

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 M31.30Overview

Is M31.30 (Wegener's granulomatosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report Wegener's granulomatosis without renal involvement on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M31.30 group to?

When Wegener's granulomatosis without renal involvement is the principal diagnosis on an inpatient stay, it groups to MS-DRG 542, 543, 544, with relative weights from 0.7546 to 1.7665 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M31.30?

Under the General Equivalence Mappings, Wegener's granulomatosis without renal involvement converts to ICD-9-CM 446.4 (Wegener's granulomatosis). The mapping is approximate, so confirm the match fits the documentation.

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.