Relapsing panniculitis [Weber-Christian]

This code represents a chronic inflammatory condition affecting the subcutaneous fat, characterized by recurrent episodes of tender nodules or plaques. It is also known as Weber-Christian disease, a rare form of panniculitis with systemic manifestations. The condition involves inflammation and necrosis of fat cells, leading to skin lesions and sometimes fever or malaise.

Assign this code when documentation specifically identifies a diagnosis of relapsing panniculitis or Weber-Christian disease. This code is appropriate for patients experiencing recurrent episodes of subcutaneous fat inflammation without an identifiable underlying cause like lupus. Ensure the physician's notes clearly distinguish it from other forms of panniculitis.

• Do not code with L93.2 (Lupus panniculitis) as per Excludes1 note.
• Avoid using this code for unspecified panniculitis; refer to M79.3- for those cases.
• Confirm the "relapsing" nature of the condition is documented to differentiate from acute or single episodes of panniculitis.