Acute lymphangitis of flank

This code signifies an acute bacterial or inflammatory infection of the lymphatic vessels located in the flank region. It is characterized by red, tender streaks extending from an infection site, often accompanied by fever and malaise. The infection typically involves the superficial lymphatic system.

Apply this code when documentation clearly indicates an acute inflammatory process of the lymphatic vessels specifically affecting the flank. Supporting documentation should include a physician's diagnosis of acute lymphangitis and specify the anatomical location as the flank. This code is appropriate for both infectious and non-infectious causes of acute lymphangitis.

• Ensure the documentation specifies "acute" and "flank" to differentiate from chronic or other anatomical sites.
• Code any underlying infection (e.g., cellulitis, wound infection) as a primary diagnosis if it is the cause of the lymphangitis.
• Do not confuse with cellulitis (L03.11-) unless lymphangitis is explicitly documented as a separate condition.