2026 ICD-10-CM Diagnosis Code L12.1Cicatricial pemphigoid

ICD-10-CM Codes›L00–L99›L10-L14›L12

ICD-10-CM L12.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

L12.1 is a billable ICD-10-CM diagnosis code for cicatricial pemphigoid. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 595 through 596. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.

Code Identity

ICD-10-CM Code
L12.1
Billable Status
Yes — Valid for Submission
Code Describes
Cicatricial pemphigoid
Short Description
Cicatricial pemphigoid
Same as the full description in the CMS dataset.
Parent Code
L12
Pemphigoid

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL10-L14Bullous disorders
CategoryL12Pemphigoid
This CodeL12.1Cicatricial pemphigoid

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Autoimmune bullous dermatosis due to drug
  • Benign mucous membrane pemphigoid
  • Benign mucous membrane pemphigoid with ocular involvement
  • Brunsting-Perry type cicatricial pemphigoid
  • Bullous dermatosis precipitated by drug treatment
  • Drug-induced cicatricial pemphigoid
  • Mucous membrane pemphigoid of penile mucosa
  • Mucous membrane pemphigoid with esophageal involvement
  • Ocular cicatricial pemphigoid
  • Oral involvement by mucous membrane pemphigoid

Tabular List NotesGuidance

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

Inclusion Terms

  • Benign mucous membrane pemphigoid

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)
      • bullous, bullosa
        • mucosynechial, atrophic
    • Pemphigoid
      • benign, mucous membrane
    • Pemphigoid
      • cicatricial
    • Pemphigoid
      • ocular
    • Pemphigus
      • conjunctiva
    • Pemphigus
      • ocular

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

  • Ocular Cicatricial Pemphigoid

    a chronic autoimmune disorder that belongs to the mucous membrane pemphigoid disorders. it is characterized by bilateral scarring and opacification of the conjunctivae. it presents with pain and burning sensation in the eyes and photophobia. it leads to blindness.

  • Benign Mucous Membrane Pemphigoid

    a chronic autoimmune disorder characterized by the development of blisters and ulcers in mucous membranes. it affects most often the gums, eyelids and genital mucosa sites.

Patient EducationClinical

Pemphigus

Pemphigus is an autoimmune disorder. If you have it, your immune system attacks healthy cells in your skin and mouth, causing blisters and sores. No one knows the cause. Pemphigus does not spread from person to person. It does not appear to be inherited. But some people's genes put them more at risk for pemphigus.

Read the full article at MedlinePlus

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

Convert L12.1 to ICD-9-CMHistory

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

ICD-9-CM
694.60 Bn mucous memb pemph NOS
Approximate The match is approximate rather than exact.
ICD-9-CM
694.61 Ocular pemphigus
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About L12.1Overview

Is L12.1 (Pemphigoid) a billable code?

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

What MS-DRG does L12.1 group to?

When cicatricial pemphigoid is the principal diagnosis on an inpatient stay, it groups to MS-DRG 595, 596, with relative weights from 1.0825 to 2.1207 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of L12.1?

Under the General Equivalence Mappings, cicatricial pemphigoid converts to ICD-9-CM 694.60 (bn mucous memb pemph NOS) and 694.61 (ocular pemphigus). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.