2026 ICD-10-CM Diagnosis Code L27.2Dermatitis due to ingested food

ICD-10-CM Codes›L00–L99›L20-L30›L27

ICD-10-CM L27.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L27.2 is a billable ICD-10-CM diagnosis code for dermatitis due to ingested food. 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 caused by ingested food. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Allergic reactions and Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L27.2
Billable Status
Yes — Valid for Submission
Code Describes
Dermatitis due to ingested food
Short Description
Dermatitis due to ingested food
Same as the full description in the CMS dataset.
Parent Code
L27
Dermatitis due to substances taken internally

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL20-L30Dermatitis and eczema
CategoryL27Dermatitis due to substances taken internally
This CodeL27.2Dermatitis due to ingested food

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dermatitis caused by ingested food
  • Dermatitis caused by substance taken via oral route

Tabular List NotesGuidance

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

Type 2 Excludes

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.

    • Allergy, allergic(reaction) (to)
      • milk protein
        • dermatitis
    • Dermatitis(eczematous)
      • due to
        • cereal (ingested)
    • Dermatitis(eczematous)
      • due to
        • coffee (ingested)
    • Dermatitis(eczematous)
      • due to
        • fish (ingested)
    • Dermatitis(eczematous)
      • due to
        • flour (ingested)
    • Dermatitis(eczematous)
      • due to
        • food (ingested)
    • Dermatitis(eczematous)
      • due to
        • fruit (ingested)
    • Dermatitis(eczematous)
      • due to
        • ingestion, ingested substance
          • food
    • Dermatitis(eczematous)
      • due to
        • internal agent
          • food
    • Dermatitis(eczematous)
      • due to
        • meat (ingested)
    • Dermatitis(eczematous)
      • due to
        • milk (ingested)
    • Food
      • allergy

Clinical ClassificationClinical

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

CCSR INJ031
Allergic reactions
Default principal diagnosis: inpatient No · outpatient No
CCSR SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Food Allergy

A food allergy is an abnormal immune system reaction to certain foods. Your immune system normally protects you from germs. But if you have a food allergy, your immune system mistakenly reacts to certain foods as if they were harmful. This reaction is usually mild. But in some cases, it can be serious or even life-threatening.

The full article covers:

  • What is a food allergy?
  • Who is more likely to develop a food allergy?
  • What are the symptoms of food allergies?
  • How are food allergies diagnosed?
  • What are the treatments for food allergies?

Read the full article at MedlinePlus

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

Convert L27.2 to ICD-9-CMHistory

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

ICD-9-CM
693.1 Dermat d/t food ingest
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 L27.2Overview

Is L27.2 (Dermatitis due to substances taken internally) a billable code?

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

What MS-DRG does L27.2 group to?

When dermatitis due to ingested food 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 L27.2?

Under the General Equivalence Mappings, dermatitis due to ingested food converts to ICD-9-CM 693.1 (dermat d/t food ingest). 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.