Chronic lymphadenitis

This code signifies persistent inflammation of one or more lymph nodes, characterized by enlargement and tenderness, lasting for an extended period. It indicates a chronic inflammatory process affecting the lymphatic system, often in response to a prolonged infection or other underlying pathology.

Use this code when documentation specifies chronic lymph node inflammation, such as "chronic cervical lymphadenitis" or "chronic inguinal lymphadenopathy." It is appropriate when the condition has persisted for weeks or months, differentiating it from acute presentations. Supporting documentation should clearly indicate the chronicity of the lymph node involvement.

• Differentiate from acute lymphadenitis (e.g., 683), which is typically sudden onset and short-lived.
• Always seek to identify and code any underlying cause of the chronic lymphadenitis, if known.
• Avoid using this code for generalized lymphadenopathy unless the documentation specifically states chronic inflammation of the nodes.