ICD-10 Code I73.81 – Erythromelalgia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I73.81 – Erythromelalgia
What it is
Erythromelalgia is a disorder marked by episodes of burning pain, redness, and warmth, usually affecting the feet or hands. Symptoms often come and go and may worsen with heat or activity.
Clinical signs
Typical findings include visible erythema, increased skin temperature, and pain that patients describe as burning or throbbing. Clinical features vary; refer to documentation.
When to use this code
Use I73.81 when the provider documents erythromelalgia by name or clearly describes the condition. It is appropriate when the record supports recurrent painful flushing or warmth of the extremities consistent with this diagnosis. If the note only mentions nonspecific limb pain or redness, check documentation before coding.
Do not use for
Do not use this code for uncomplicated peripheral vascular disease, cellulitis, or general neuropathic pain without documentation of erythromelalgia. Check documentation if the presentation may reflect another cause.
Coding tip
Code the condition only when the diagnosis is explicitly stated or clearly supported in the assessment.