Acute lymphangitis, unspecified

This diagnosis code signifies an acute inflammatory condition of the lymphatic vessels, characterized by red streaks extending from an infection site, often accompanied by fever and chills. It represents a sudden onset of lymphatic vessel inflammation without further specification of the underlying cause or specific anatomical location.

Assign this code when documentation indicates acute lymphangitis but lacks details regarding its etiology (e.g., bacterial, fungal) or specific anatomical site. It is appropriate when the provider's diagnosis is simply "acute lymphangitis" without further elaboration.

• Do not use this code if the documentation specifies "lymphangitis NOS" (not otherwise specified), as that maps to I89.1.
• Always attempt to query the provider for more specific information regarding the cause or location of the lymphangitis to allow for a more precise code assignment.
• Consider co-coding with an underlying infection code if documented, as lymphangitis is often a secondary manifestation.