Melkersson's syndrome

This code identifies Melkersson-Rosenthal syndrome, a rare neurological disorder characterized by a classic triad of recurrent facial paralysis, chronic orofacial swelling (cheilitis granulomatosa), and fissured tongue (lingua plicata). Patients may present with all three symptoms or only one or two, with symptoms often appearing in childhood or adolescence. The condition is chronic and can lead to permanent disfigurement if left untreated.

Assign this code when documentation clearly indicates a diagnosis of Melkersson-Rosenthal syndrome. This includes cases where the full triad is present, or when a partial presentation (e.g., isolated recurrent facial swelling or facial palsy with fissured tongue) is definitively diagnosed as part of this syndrome. Supporting documentation should include physician notes detailing the characteristic symptoms and diagnostic workup ruling out other conditions.

• Ensure the physician's documentation explicitly states "Melkersson's syndrome" or "Melkersson-Rosenthal syndrome" for accurate coding.
• Do not use this code for isolated facial paralysis (e.g., Bell's palsy) or isolated orofacial swelling without a definitive diagnosis of Melkersson's syndrome.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, especially for diagnostic workup or management of the syndrome's manifestations.