2026 ICD-10-CM Diagnosis Code L30.0Nummular dermatitis

ICD-10-CM Codes›L00–L99›L20-L30›L30

ICD-10-CM L30.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L30.0 is a billable ICD-10-CM diagnosis code for nummular 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified and unspecified skin disorders.

Code Identity

ICD-10-CM Code
L30.0
Billable Status
Yes — Valid for Submission
Code Describes
Nummular dermatitis
Short Description
Nummular dermatitis
Same as the full description in the CMS dataset.
Parent Code
L30
Other and unspecified dermatitis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL30Other and unspecified dermatitis
This CodeL30.0Nummular dermatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adult atopic dermatitis
  • Adult nummular atopic dermatitis
  • Childhood atopic dermatitis
  • Childhood nummular atopic eczematous dermatitis
  • Discoid eczema of hand
  • Discoid eczema of hands and feet
  • Dry discoid eczema
  • Exudative discoid eczema
  • Exudative eczema
  • Nummular eczema

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)
      • nummular

Clinical ClassificationClinical

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

CCSR INJ031
Allergic reactions
Default principal diagnosis: inpatient No · outpatient No
CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Eczema

Eczema is a term for several different types of skin swelling. Eczema is also called dermatitis. Most types cause dry, itchy skin and rashes on the face, inside the elbows and behind the knees, and on the hands and feet. Scratching the skin can cause it to turn red, and to swell and itch even more.

Read the full article at MedlinePlus

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

Convert L30.0 to ICD-9-CMHistory

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

ICD-9-CM
692.9 Dermatitis NOS
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 L30.0Overview

Is L30.0 (Other and unspecified dermatitis) a billable code?

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

What MS-DRG does L30.0 group to?

When nummular 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 L30.0?

Under the General Equivalence Mappings, nummular dermatitis converts to ICD-9-CM 692.9 (dermatitis NOS). The mapping is approximate, so confirm the match fits the documentation.

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.