2026 ICD-10-CM Diagnosis Code L98.1Factitial dermatitis

ICD-10-CM Codes›L00–L99›L80-L99›L98

ICD-10-CM L98.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L98.1 is a billable ICD-10-CM diagnosis code for factitial dermatitis. 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. Coders also document this condition as artefactual skin disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L98.1
Billable Status
Yes — Valid for Submission
Code Describes
Factitial dermatitis
Short Description
Factitial dermatitis
Same as the full description in the CMS dataset.
Parent Code
L98
Other disorders of skin and subcutaneous tissue, not elsewhere classified

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL80-L99Other disorders of the skin and subcutaneous tissue
CategoryL98Other disorders of skin and subcutaneous tissue, not elsewhere classified
This CodeL98.1Factitial dermatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Artefactual skin disease
  • Cutaneous Munchausen syndrome
  • Dermatological pathomimicry
  • Factitious blistering
  • Factitious skin disease
  • Patch test artifact
  • Pseudostigmata
  • Religious stigmata
  • Repetitive self-excoriation

Tabular List NotesGuidance

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

Inclusion Terms

  • Neurotic excoriation

Type 1 Excludes

  • Excoriation skin-picking disorder F42.4

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.

    • Dermatitis(eczematous)
      • artefacta
    • Dermatitis(eczematous)
      • facta, factitia, factitial
    • Dermatosis
      • factitial
    • Eruption
      • skin (nonspecific)
        • feigned
    • Excoriation(traumatic)
      • neurotic
    • Neurosis, neurotic
      • excoriation

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

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 L98.1 to ICD-9-CMHistory

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

ICD-9-CM
698.4 Dermatitis factitia
Exact Match The mapping is direct, with no qualifiers.

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 L98.1Overview

Is L98.1 a billable code?

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

What MS-DRG does L98.1 group to?

When factitial dermatitis 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 L98.1?

Under the General Equivalence Mappings, factitial dermatitis converts to ICD-9-CM 698.4 (dermatitis factitia). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.