ICD-10 Code L12.0 – Bullous pemphigoid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L12.0 – Bullous pemphigoid
What it is
Bullous pemphigoid is an autoimmune blistering skin disorder that causes tense blisters, usually in older adults. The code identifies this specific diagnosis, not other blistering diseases.
Clinical signs
Typical findings include pruritic urticarial plaques and tense bullae on the skin. Mucosal involvement is less common; clinical features vary, refer to documentation.
When to use this code
Use L12.0 when the provider documents bullous pemphigoid, pemphigoid, or a confirmed autoimmune blistering eruption consistent with this diagnosis. Code it from the final diagnosis, biopsy result, or specialist assessment when stated clearly. If the chart only says “blisters,” check documentation.
Do not use for
Do not use this code for pemphigus, dermatitis herpetiformis, or simple friction blisters. If the record does not support bullous pemphigoid specifically, choose a more accurate diagnosis or check documentation.
Coding tip
Confirm the exact blistering disorder named by the clinician before assigning L12.0.