What does ICD-10 code L27 mean?

ICD-10 code L27 is the standardized code used for dermatitis due to substances taken internally in medical records and coding systems.

When is ICD-10 code L27 used?

Doctors, hospitals, and insurers may use ICD-10 code L27 when recording dermatitis due to substances taken internally in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code L27 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code L27: Dermatitis due to substances taken internally

Name: ICD-10 Code L27: Dermatitis due to substances taken internally
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:16:34.316Z

L27 is an ICD-10 diagnosis entry used to group records related to Dermatitis due to substances taken internally. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the skin and subcutaneous tissue (L00-L99).

When is it used?

May be used when a clinician documents dermatitis due to substances taken internally in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

12Diseases of the skin and subcutaneous tissue (L00-L99)

block

L20-L30Dermatitis and eczema

currentL20-L30

Official coding notes

Excludes1 (do not code together)

allergy NOS (T78.40)

Excludes2 (may code together if documented)

adverse food reaction, except dermatitis (T78.0-T78.1)
contact dermatitis (L23-L25)
drug photoallergic response (L56.1)
drug phototoxic response (L56.0)
urticaria (L50.-)

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

Dermatologist

Sibling codes

L20Atopic dermatitis L21Seborrheic dermatitis L22Diaper dermatitisbillable L23Allergic contact dermatitis L24Irritant contact dermatitis L25Unspecified contact dermatitis L26Exfoliative dermatitisbillable L28Lichen simplex chronicus and prurigo L29Pruritus L30Other and unspecified dermatitis

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

L27

Replacement codes

L27.0 — Generalized skin eruption due to drugs and medicaments taken internallyL27.1 — Localized skin eruption due to drugs and medicaments taken internallyL27.2 — Dermatitis due to ingested foodL27.8 — Dermatitis due to other substances taken internallyL27.9 — Dermatitis due to unspecified substance taken internally

Common synonyms

Dermatitis due to substances taken internally

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.