ICD-10 Code L10 – Pemphigus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L10 – Pemphigus
What it is
L10 identifies pemphigus, a group of autoimmune blistering disorders that affect the skin and sometimes mucous membranes. It is used when the record documents pemphigus without a more specific subtype.
Clinical signs
Typical findings include fragile blisters that break easily, causing painful erosions. Oral or other mucosal involvement may occur; clinical features vary, so refer to documentation.
When to use this code
Use L10 when the clinician documents pemphigus and does not specify a more detailed diagnosis such as a subtype. It also fits encounters focused on evaluation, follow-up, or monitoring of documented pemphigus. Check documentation if the note names a different blistering disorder.
Do not use for
Do not use this code for other bullous or autoimmune skin diseases that are not documented as pemphigus. If the record is unclear, check documentation before assigning L10.
Coding tip
Code the most specific pemphigus diagnosis documented; if subtype is absent, L10 is appropriate.