2027 ICD-10-CM Diagnosis Code L13.0Dermatitis herpetiformis

ICD-10-CM Codes›L00–L99›L10-L14›L13

ICD-10-CM L13.0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L13.0 is a billable ICD-10-CM diagnosis code for dermatitis herpetiformis. 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 conjunctivitis associated with autoimmune skin disorder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

L13.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 314 for payment year 2027.

Code Identity

ICD-10-CM Code
L13.0
Billable Status
Yes — Valid for Submission
Code Describes
Dermatitis herpetiformis
Short Description
Dermatitis herpetiformis
Same as the full description in the CMS dataset.
Parent Code
L13
Other bullous disorders

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL10-L14Bullous disorders
CategoryL13Other bullous disorders
This CodeL13.0Dermatitis herpetiformis

Medicare Risk Adjustment (HCC)Billing

L13.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 314 — Pemphigus, Pemphigoid, and Other Bullous Skin Disorders
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with dermatitis herpetiformis
  • Dermatitis herpetiformis
  • Gluten intolerance
  • Herpetiform eruption
  • Hydroa herpetiformis
  • Oral mucosal involvement by dermatitis herpetiformis
  • Vesicular eruption

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L13.0: its own notes plus those printed at block L10-L14 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Duhring's disease
  • Hydroa herpetiformis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On L13.0 itself
  • juvenile dermatitis herpetiformis (L12.2)
  • senile dermatitis herpetiformis (L12.0)
From Block L10-L14 Bullous disorders applies to 26 codes
  • benign familial pemphigus [Hailey-Hailey] (Q82.8)
  • staphylococcal scalded skin syndrome (L00)
  • toxic epidermal necrolysis [Lyell] (L51.2)

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 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.-)

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L13.0, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming L13.0: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block L20-L30 Dermatitis and eczema
    dermatitis herpetiformis (L13.0)

Use Additional Code 1

These codes say to use an additional code from the note, and L13.0 is one of the codes named.

  • K90.0 Celiac disease
    dermatitis herpetiformis (L13.0)

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 SKN002
Other specified inflammatory condition of skin
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Dermatitis Herpetiformis

    rare, chronic, papulo-vesicular disease characterized by an intensely pruritic eruption consisting of various combinations of symmetrical, erythematous, papular, vesicular, or bullous lesions. the disease is strongly associated with the presence of hla-b8 and hla-dr3 antigens. a variety of different autoantibodies has been detected in small numbers in patients with dermatitis herpetiformis.

Patient EducationClinical

Skin Conditions

Your skin is your body's largest organ. It covers the entire outside of your body. There are many ways that your skin protects your body and helps keep you healthy. For example, it:

The full article covers:

  • What does your skin do?
  • What problems and conditions can affect your skin?
  • How can I keep my skin healthy?

Read the full article at MedlinePlus

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

Convert L13.0 to ICD-9-CMHistory

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

ICD-9-CM
694.0 Dermatitis herpetiformis
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L13.0Overview

What is the ICD-10 code for dermatitis herpetiformis?

The ICD-10-CM code for dermatitis herpetiformis is L13.0 (sometimes written as L130). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is L13.0 (Other bullous disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report dermatitis herpetiformis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does L13.0 group to?

When dermatitis herpetiformis 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.

Can L13.0 be reported with L12.2?

Not as a rule. The Excludes1 note on L13.0 lists "juvenile dermatitis herpetiformis (L12.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of L13.0?

Under the General Equivalence Mappings, dermatitis herpetiformis converts to ICD-9-CM 694.0 (dermatitis herpetiformis). The mapping is a direct match.

Does L13.0 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: L13.0 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 314 (Pemphigus, Pemphigoid, and Other Bullous Skin Disorders).