2026 ICD-10-CM Diagnosis Code L22Diaper dermatitis

ICD-10-CM Codes›L00–L99›L20-L30›L22

ICD-10-CM L22
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L22 is a billable ICD-10-CM diagnosis code for diaper 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 dermatitis of the newborn. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Contact dermatitis.

Code Identity

ICD-10-CM Code
L22
Billable Status
Yes — Valid for Submission
Code Describes
Diaper dermatitis
Chapter
L20-L30
Dermatitis and eczema

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL22Diaper dermatitis
This CodeL22Diaper dermatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dermatitis of the newborn
  • Diaper candidiasis
  • Diaper rash
  • Infection of diaper area
  • Perianal dermatitis
  • Perianal dermatitis of newborn
  • Psoriasiform dermatitis
  • Psoriasiform napkin eruption
  • Truncal seborrheic dermatitis

Tabular List NotesGuidance

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

Inclusion Terms

  • Diaper erythema
  • Diaper rash
  • Psoriasiform diaper rash

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)
      • ammonia
    • Dermatitis(eczematous)
      • diaper
    • Dermatitis(eczematous)
      • Jacquet's (diaper dermatitis)
    • Dermatitis(eczematous)
      • napkin
    • Diaper rash
    • Eruption
      • napkin
    • Erythema, erythematous(infectional) (inflammation)
      • diaper
    • Erythema, erythematous(infectional) (inflammation)
      • gluteal
    • Erythema, erythematous(infectional) (inflammation)
      • napkin
    • Jacquet's dermatitis(diaper dermatitis)
    • Napkin rash
    • Rash(toxic)
      • diaper
    • Rash(toxic)
      • napkin (psoriasiform)

Clinical ClassificationClinical

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

CCSR SKN005
Contact dermatitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Diaper Rash

    a type of irritant dermatitis localized to the area in contact with a diaper and occurring most often as a reaction to prolonged contact with urine, feces, or retained soap or detergent.

  • Psoriasiform Dermatitis

    a chronic, sporadic, acquired pruritic non-infectious skin condition characterized by one or more well defined inflamed (pink or red) patches or plaques of varying size.

Patient EducationClinical

Common Infant and Newborn Problems

It is hard when your baby is sick. Common health problems in babies include colds, coughs, fevers, and vomiting. Babies also commonly have skin problems, like diaper rash or cradle cap.

Read the full article at MedlinePlus

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

Convert L22 to ICD-9-CMHistory

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

ICD-9-CM
691.0 Diaper or napkin rash
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 L22Overview

Is L22 (Diaper dermatitis) a billable code?

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

What MS-DRG does L22 group to?

When diaper 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 L22?

Under the General Equivalence Mappings, diaper dermatitis converts to ICD-9-CM 691.0 (diaper or napkin rash). 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.