2026 ICD-10-CM Diagnosis Code L93.0Discoid lupus erythematosus

ICD-10-CM Codes›L00–L99›L80-L99›L93

ICD-10-CM L93.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L93.0 is a billable ICD-10-CM diagnosis code for discoid lupus erythematosus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 595 through 596. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin and Systemic lupus erythematosus and connective tissue disorders.

Code Identity

ICD-10-CM Code
L93.0
Billable Status
Yes — Valid for Submission
Code Describes
Discoid lupus erythematosus
Short Description
Discoid lupus erythematosus
Same as the full description in the CMS dataset.
Parent Code
L93
Lupus erythematosus

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL93Lupus erythematosus
This CodeL93.0Discoid lupus erythematosus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chilblain lupus erythematosus
  • Chronic discoid lupus erythematosus
  • Discoid lupus erythematosus
  • Discoid lupus erythematosus of face
  • Discoid lupus erythematosus of foot
  • Discoid lupus erythematosus of genital mucous membranes
  • Discoid lupus erythematosus of hands
  • Discoid lupus erythematosus of lip
  • Discoid lupus erythematosus of mucous membranes
  • Discoid lupus erythematosus of oral mucosa
  • Discoid lupus erythematosus of scalp
  • Familial chilblain lupus erythematosus
  • Gingival disease due to lupus erythematosus
  • Hypermelanosis due to connective tissue disorder
  • Hypertrophic type discoid lupus erythematosus
  • Lichen planus-lupus erythematosus overlap
  • Lupus erythematosus
  • Lupus erythematosus and erythema multiforme-like syndrome
  • Lupus erythematosus chronicus
  • Lupus erythematosus migrans
  • Lupus erythematosus overlap syndrome
  • Lupus erythematosus unguium mutilans
  • Lupus erythematosus-associated calcinosis
  • Lupus erythematosus-associated hypermelanosis
  • Lupus erythematosus-associated nail dystrophy
  • Lupus erythematosus-associated nailfold telangiectasia
  • Lupus erythematosus-associated necrotizing vasculitis
  • Lupus erythematosus-associated papulonodular mucinosis
  • Lupus vasculitis
  • Necrotizing cutaneous vasculitis
  • Necrotizing vasculitis secondary to connective tissue disease
  • Neonatal lupus erythematosus
  • Overlap syndrome
  • Poikiloderma due to lupus erythematosus
  • Rosaceous type discoid lupus erythematosus
  • Secondary catabolic mucinosis of skin
  • Secondary systemic vasculitis
  • Subcutaneous nodule associated with lupus erythematosus
  • Telangiectasia of nailfolds

Tabular List NotesGuidance

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

Inclusion Terms

  • Lupus erythematosus 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.

    • Biett's disease
    • Lupus
      • discoid (local)
    • Lupus
      • erythematosus (discoid) (local)
    • Lupus
      • nontuberculous, not disseminated

Clinical ClassificationClinical

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

CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR MUS024
Systemic lupus erythematosus and connective tissue disorders
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Exosome Component 10|Autoantigen PM-SCL|Autoantigen PM/Scl|EC 3.1.13.-|EXOSC10|P100 Polymyositis-Scleroderma Overlap Syndrome-Associated Autoantigen|PM/Scl-100|Polymyositis/Scleroderma Autoantigen 100 kDa|Polymyositis/Scleroderma Autoantigen 2

    exosome component 10 (885 aa, ~101 kda) is encoded by the human exosc10 gene. this protein plays a role in the maturation and degradation of rna.

  • Other Overlap Syndromes|Other overlap syndromes

    evidence of other overlap syndromes not specified elsewhere.

  • Overlap Syndrome

    an autoimmune, connective tissue disorder in which the patient exhibits features from two or more diseases. these typically include systemic sclerosis, dermatomyositis, polymyositis, rheumatoid arthritis, systemic lupus erythematosus, and sjogren syndrome; in pediatrics the respective pediatric entities are encountered.

  • Scleroderma Polymyositis Overlap Syndrome|Scleroderma Polymyositis

    a rare autoimmune disorder in which patients present with overlapping symptoms of systemic scleroderma and polymyositis or dermatomyositis.

  • Neonatal Lupus Erythematosus

    a self-limited skin rash that appears in the neonatal period and usually resolves in four to six months after birth. it is caused by placental transfer of maternal autoantibodies, usually anti-ro antibody. in a minority of cases, it is associated with congenital heart block, hepatitis, or thrombocytopenia. the mothers of the affected babies may be asymptomatic or suffer from systemic lupus erythematosus, sjogren's syndrome, or rheumatoid arthritis.

  • Exosome Complex Component RRP45|AMPA RECEPTORS|Autoantigen PM/Scl 1|EXOSC9|Exosome Component 9|GLuRs|P75 Polymyositis-Scleroderma Autoantigen|P75 Polymyositis-Scleroderma Overlap Syndrome Associated Autoantigen|P75 Polymyositis-Scleroderma Overlap Syndrome-Associated Autoantigen|PM/Scl-75|Polymyositis/Scleroderma Autoantigen 1|Polymyositis/Scleroderma Autoantigen 75 kDa

    exosome complex component rrp45 (439 aa, ~49 kda) is encoded by the human exosc9 gene. this protein is involved in the regulation of the exoribonuclease activity of the exosome.

  • Exosome Component 10|Autoantigen PM-SCL|Autoantigen PM/Scl|EC 3.1.13.-|EXOSC10|EXOSC10|P100 POLYMYOSITIS-SCLERODERMA AUTOANTIGEN|P100 Polymyositis-Scleroderma Overlap Syndrome-Associated Autoantigen|PM/Scl 2|PM/Scl-100|PM/Scl-100|Polymyositis/Scleroderma Autoantigen 100 kDa|Polymyositis/Scleroderma Autoantigen 2|Polymyositis/Scleroderma Autoantigen 2

    exosome component 10 (885 aa, ~101 kda) is encoded by the human exosc10 gene. this protein plays a role in the maturation and degradation of rna.

Patient EducationClinical

Lupus

Lupus is a chronic (long-lasting) type of autoimmune disease.Autoimmune diseases happen when your immune system attacks healthy cells and tissues by mistake. This attack causes inflammation. It can also damage many parts of the body, including the joints, skin, kidneys, heart, lungs, and brain.

The full article covers:

  • What is lupus?
  • What causes lupus?
  • Who is more likely to get lupus?
  • What are the symptoms of lupus?
  • What other problems can lupus cause?
  • How is lupus diagnosed?
  • What are the treatments for lupus?
  • How can I cope with lupus?

Read the full article at MedlinePlus

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

Convert L93.0 to ICD-9-CMHistory

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

ICD-9-CM
695.4 Lupus erythematosus
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 L93.0Overview

Is L93.0 (Lupus erythematosus) a billable code?

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

What MS-DRG does L93.0 group to?

When discoid lupus erythematosus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 595, 596, with relative weights from 1.0825 to 2.1207 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L93.0?

Under the General Equivalence Mappings, discoid lupus erythematosus converts to ICD-9-CM 695.4 (lupus erythematosus). 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.