2026 ICD-10-CM Diagnosis Code M32.11Endocarditis in systemic lupus erythematosus

ICD-10-CM Codes›M00–M99›M30-M36›SLE

ICD-10-CM M32.11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M32.11 is a billable ICD-10-CM diagnosis code for endocarditis in systemic lupus erythematosus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 545 through 547. Coders also document this condition as disorder of heart due to systemic lupus erythematosus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Endocarditis and endocardial disease and Systemic lupus erythematosus and connective tissue disorders.

Code Identity

ICD-10-CM Code
M32.11
Billable Status
Yes — Valid for Submission
Code Describes
Endocarditis in systemic lupus erythematosus
Short Description
Endocarditis in systemic lupus erythematosus
Same as the full description in the CMS dataset.
Parent Code
M32.1
Systemic lupus erythematosus with organ or system involvement

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM30-M36Systemic connective tissue disorders
CategorySLESystemic lupus erythematosus (M32)
This CodeM32.11Endocarditis in systemic lupus erythematosus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of heart due to systemic lupus erythematosus
  • Endocarditis associated with another disorder
  • Endocarditis due to systemic lupus erythematosus
  • Nonbacterial verrucal endocardiosis

Tabular List NotesGuidance

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

Inclusion Terms

  • Libman-Sacks disease

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.

    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • atypical verrucous (Libman-Sacks)
    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • Libman-Sacks
    • Endocarditis(chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
      • verrucous (atypical) (nonbacterial) (nonrheumatic)
    • Libman-Sacks disease
    • Lupus
      • erythematosus (discoid) (local)
        • systemic
          • with organ or system involvement
            • endocarditis
    • Sacks-Libman disease

Clinical ClassificationClinical

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

CCSR CIR004
Endocarditis and endocardial disease
Default principal diagnosis: inpatient No · outpatient No
CCSR MUS024
Systemic lupus erythematosus and connective tissue disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Endocarditis

Endocarditis is sometimes called infective endocarditis. It's a rare but life-threatening inflammation of the lining inside your heart's chambers and valves (the endocardium).

The full article covers:

  • What is endocarditis?
  • What causes endocarditis?
  • Who is more likely to develop endocarditis?
  • What are the symptoms of endocarditis?
  • What other problems can endocarditis cause?
  • How is endocarditis diagnosed?
  • What are the treatments for endocarditis?
  • Can endocarditis be prevented?

Read the full article at MedlinePlus

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

Convert M32.11 to ICD-9-CMHistory

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

ICD-9-CM
710.0 Syst lupus erythematosus
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
424.91 Endocarditis in oth dis
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 M32.11Overview

Is M32.11 a billable code?

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

What MS-DRG does M32.11 group to?

When endocarditis in systemic lupus erythematosus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 545, 546, 547, with relative weights from 0.8362 to 2.4817 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M32.11?

Under the General Equivalence Mappings, endocarditis in systemic lupus erythematosus converts to ICD-9-CM 710.0 (syst lupus erythematosus) and 424.91 (endocarditis in oth dis). 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.