2026 ICD-10-CM Diagnosis Code L24.1Irritant contact dermatitis due to oils and greases

ICD-10-CM Codes›L00–L99›L20-L30›L24

ICD-10-CM L24.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L24.1 is a billable ICD-10-CM diagnosis code for irritant contact dermatitis due to oils and greases. 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 Contact dermatitis.

Code Identity

ICD-10-CM Code
L24.1
Billable Status
Yes — Valid for Submission
Code Describes
Irritant contact dermatitis due to oils and greases
Short Description
Irritant contact dermatitis due to oils and greases
Same as the full description in the CMS dataset.
Parent Code
L24
Irritant contact dermatitis

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL24Irritant contact dermatitis
This CodeL24.1Irritant contact dermatitis due to oils and greases

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Contact dermatitis caused by automotive grease
  • Contact dermatitis caused by hydrocarbon
  • Irritant contact dermatitis caused by automotive grease
  • Irritant contact dermatitis caused by chemical
  • Irritant contact dermatitis caused by oil
  • Irritant contact dermatitis of hand
  • Irritant contact dermatitis of hand caused by automotive grease
  • Irritant contact dermatitis of hand caused by oil
  • Oil contact dermatitis

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)
      • contact (occupational)
        • irritant
          • due to
            • oils and greases
    • Dermatitis(eczematous)
      • due to
        • greases NEC (contact) (irritant)
    • Dermatitis(eczematous)
      • due to
        • oils NEC (contact) (irritant)

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

  • Irritant Contact Dermatitis

    an inflammatory skin condition caused by direct contact between the skin and an irritating substance. it is typically manifested by erythema, mild edema, and scaling at the affected site.

Patient EducationClinical

Rashes

A rash is an area of irritated or swollen skin. Many rashes are itchy, red, painful, and irritated. Some rashes can also lead to blisters or patches of raw skin. Rashes are a symptom of many different medical problems. Other causes include irritating substances and allergies. Certain genes can make people more likely to get rashes.

Read the full article at MedlinePlus

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

Convert L24.1 to ICD-9-CMHistory

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

ICD-9-CM
692.1 Oil & grease dermatitis
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 L24.1Overview

Is L24.1 (Irritant contact dermatitis) a billable code?

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

What MS-DRG does L24.1 group to?

When irritant contact dermatitis due to oils and greases 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 L24.1?

Under the General Equivalence Mappings, irritant contact dermatitis due to oils and greases converts to ICD-9-CM 692.1 (oil & grease dermatitis). 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.