ICD-10 Code L93 – Lupus erythematosus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L93 – Lupus erythematosus
What it is
L93 identifies lupus erythematosus, a group of inflammatory skin disorders that can cause chronic lesions and scarring. Use it when the record documents cutaneous lupus rather than systemic lupus.
Clinical signs
Findings may include well-defined erythematous plaques, scale, photosensitivity, and dyspigmentation. Clinical features vary; refer to documentation, especially when the note distinguishes localized discoid disease from other lupus forms.
When to use this code
Use L93 when the provider documents lupus erythematosus of the skin, including discoid or other cutaneous forms. It also fits when the chart states chronic lupus skin lesions, scarring plaques, or a confirmed cutaneous lupus diagnosis. If the record only says “lupus” without site or type, check documentation.
Do not use for
Do not use L93 for systemic lupus erythematosus or for nonspecific rash without a confirmed lupus diagnosis. If the note describes another autoimmune or dermatologic condition, code the documented condition instead.
Coding tip
Confirm whether the provider means cutaneous lupus, because “lupus” alone is not specific enough for accurate coding.