Acute lymphangitis of unspecified part of limb

This code signifies an acute bacterial infection of the lymphatic vessels, characterized by red streaks extending from an infection site, typically on an arm or leg. It involves inflammation of the lymphatic channels, often presenting with fever, chills, and malaise, without specifying which limb is affected.

Assign this code when documentation confirms acute lymphangitis without specifying the affected limb (e.g., "acute lymphangitis of extremity"). This diagnosis is commonly associated with a skin infection or wound as the primary source. Ensure the physician's notes clearly indicate the acute nature of the condition.

• Do not use this code if the specific limb (e.g., right arm, left leg) is documented; instead, use a more specific code from the L03.12- subcategory.
• Always code the underlying infection or wound that caused the lymphangitis, if known, as a primary diagnosis.
• Differentiate from cellulitis (L03.11-) which involves the skin and subcutaneous tissue, whereas lymphangitis specifically targets the lymphatic vessels.