2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L30.0 is a billable ICD-10-CM diagnosis code for nummular dermatitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 606 through 607. Coders also document this condition as adult atopic dermatitis. 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L30.0: its own notes plus those printed at L30, block L20-L30, and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From L30 Other and unspecified dermatitis applies to 8 codes
  • contact dermatitis (L23-L25)
  • dry skin dermatitis (L85.3)
  • small plaque parapsoriasis (L41.3)
  • stasis dermatitis (I87.2)
From Block L20-L30 Dermatitis and eczema applies to 74 codes
  • chronic (childhood) granulomatous disease (D71-)
  • dermatitis gangrenosa (L08.0)
  • dermatitis herpetiformis (L13.0)
  • dry skin dermatitis (L85.3)
  • factitial dermatitis (L98.1)
  • perioral dermatitis (L71.0)
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
  • stasis dermatitis (I87.2)
From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Notes

General instructions on how these codes are used.

From Block L20-L30 Dermatitis and eczema applies to 74 codes
  • In this block the terms dermatitis and eczema are used synonymously and interchangeably.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L30.0Overview

What is the ICD-10 code for nummular dermatitis?

The ICD-10-CM code for nummular dermatitis is L30.0 (sometimes written as L300). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does L30.0 group to?

When nummular dermatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 607, 606, with relative weights from 0.8772 to 1.5721 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.