ICD-10 Code L93.0 – Discoid lupus erythematosus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L93.0 – Discoid lupus erythematosus
What it is
L93.0 identifies discoid lupus erythematosus, a chronic cutaneous form of lupus that mainly affects the skin. Use it when documentation specifies discoid or chronic cutaneous lupus lesions rather than systemic lupus.
Clinical signs
Typical findings include well-demarcated, scaly plaques that may scar, cause pigment change, or lead to hair loss when the scalp is involved. Clinical features vary; refer to documentation.
When to use this code
Use L93.0 when the provider documents discoid lupus erythematosus, chronic cutaneous lupus, or localized lupus skin lesions. It is appropriate for encounters focused on skin disease, follow-up, or evaluation of persistent plaques with scarring. Check documentation if the record also suggests systemic involvement.
Do not use for
Do not use this code for systemic lupus erythematosus or unspecified lupus without skin-specific documentation. If the note describes another cutaneous lupus subtype, check documentation.
Coding tip
Assign L93.0 only when the record clearly names discoid lupus or an equivalent cutaneous diagnosis.