2026 ICD-10-CM Diagnosis Code L90.0Lichen sclerosus et atrophicus

ICD-10-CM Codes›L00–L99›L80-L99›L90

ICD-10-CM L90.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L90.0 is a billable ICD-10-CM diagnosis code for lichen sclerosus et atrophicus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L90.0
Billable Status
Yes — Valid for Submission
Code Describes
Lichen sclerosus et atrophicus
Short Description
Lichen sclerosus et atrophicus
Same as the full description in the CMS dataset.
Parent Code
L90
Atrophic disorders of skin

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL90Atrophic disorders of skin
This CodeL90.0Lichen sclerosus et atrophicus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adult lichen sclerosus
  • Anogenital lichen sclerosus
  • Bullous extragenital lichen sclerosus
  • Childhood lichen sclerosus
  • Extragenital lichen sclerosus
  • Extragenital lichen sclerosus and morphea
  • Generalized extragenital lichen sclerosus
  • Genital lichen sclerosus
  • Guttate lichen sclerosus
  • Induration of mucosa
  • Lichen sclerosus
  • Lichen sclerosus bullous type
  • Lichen sclerosus of anus
  • Localized extragenital lichen sclerosus
  • Mucosal sclerosis
  • Oral lichen sclerosus

Tabular List NotesGuidance

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

Type 2 Excludes

  • lichen sclerosus of external female genital organs N90.4
  • lichen sclerosus of external male genital organs N48.0

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.

    • Disease, diseased
      • white-spot, meaning lichen sclerosus et atrophicus
    • Lichen
      • albus
    • Lichen
      • atrophicus
    • Lichen
      • sclerosus (et atrophicus)

Clinical ClassificationClinical

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

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Lichen Sclerosus et Atrophicus

    a chronic inflammatory mucocutaneous disease usually affecting the female genitalia (vulvar lichen sclerosus) and balanitis xerotica obliterans in males. it is also called white spot disease and csillag's disease.

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

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

Convert L90.0 to ICD-9-CMHistory

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

ICD-9-CM
701.0 Circumscribe scleroderma
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 L90.0Overview

Is L90.0 (Atrophic disorders of skin) a billable code?

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

What MS-DRG does L90.0 group to?

When lichen sclerosus et atrophicus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, with relative weights from 0.9064 to 1.5132 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L90.0?

Under the General Equivalence Mappings, lichen sclerosus et atrophicus converts to ICD-9-CM 701.0 (circumscribe scleroderma). 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.