Other bullous disorders (L13) ICD-10-CM
The L13 code range covers other bullous disorders with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the L13 Range 5 codes · 4 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the L13 range.
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.
About the L13 Code Range
ICD-10 code L13 covers a group of rare skin conditions known as other bullous disorders, which cause blistering of the skin and mucous membranes. These codes help identify specific forms of blistering diseases beyond the more common bullous disorders.
The section includes codes like L13.0 for dermatitis herpetiformis—also called herpetiform eruption or hydroa herpetiformis—a condition causing itchy, blistering skin often linked to celiac disease. Code L13.1 refers to subcorneal pustular dermatitis, known as subcorneal pustular dermatosis, characterized by sterile pustules beneath the outer skin layer, sometimes associated with monoclonal gammopathy. The L13.8 code classifies various other specified autoimmune blistering diseases, including linear IgA disease and drug-induced bullous dermatoses, which can present with skin and mucosal blistering, conjunctivitis, and ulcerations. For cases where the bullous disorder isn’t clearly defined, L13.9 denotes an unspecified bullous disorder, covering a broad range of blistering eruptions and related symptoms like bullous eruptions from insect bites or neonatal blistering conditions. These codes are essential for accurate diagnosis and treatment of uncommon blistering skin diseases in clinical practice.
Questions About This Page
How many billable codes are in the L13 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the L13 range classify?
The range classifies other bullous disorders. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
