Acute lymphangitis of unspecified finger

This code signifies an acute bacterial or fungal infection of the lymphatic vessels in an unspecified finger, characterized by red streaks extending proximally from the infection site, often accompanied by pain, tenderness, and regional lymphadenopathy. It indicates inflammation of the lymphatic channels, not the surrounding tissue (cellulitis).

Apply this code when documentation clearly specifies acute lymphangitis affecting a finger, but the specific finger (e.g., thumb, index) is not identified. Supporting documentation would include physician notes detailing the characteristic red streaking, tenderness along lymphatic pathways, and a diagnosis of lymphangitis.

• Ensure documentation specifies "acute" and "lymphangitis" of a finger; do not use for chronic conditions or cellulitis.
• If the specific finger is documented, use a more precise code from the L03.02 series (e.g., L03.021 for right thumb).
• Code any underlying infection (e.g., wound infection, cellulitis) as an additional diagnosis, as lymphangitis is often a complication.