2026 ICD-10-CM Diagnosis Code L12.31Epidermolysis bullosa due to drug
ICD-10-CM Codes›L00–L99›L10-L14›L12
- Billable — Valid for Submission
- Not Chronic
L12.31 is a billable ICD-10-CM diagnosis code for epidermolysis bullosa due to drug. 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. Coders also document this condition as acquired epidermolysis bullosa. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified inflammatory condition of skin.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired epidermolysis bullosa
- Autoimmune bullous dermatosis due to drug
- Bullous dermatosis precipitated by drug treatment
- Drug-induced epidermolysis bullosa acquisita
- Epidermal fragility
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- bullosa (congenital) - Q81.9
- drug-induced - L12.31
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Epidermolysis
- bullosa (congenital)
- acquired
- drug-induced
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 L12.31 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About L12.31Overview
Is L12.31 (Acquired epidermolysis bullosa) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report epidermolysis bullosa due to drug on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does L12.31 group to?
When epidermolysis bullosa due to drug 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 L12.31?
Under the General Equivalence Mappings, epidermolysis bullosa due to drug converts to ICD-9-CM 695.15 (toxic epidrml necrolysis). The mapping is approximate, so confirm the match fits the documentation.
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.
