Acute lymphadenitis, unspecified

This code signifies an acute inflammatory process of the lymph nodes, characterized by swelling, tenderness, and often pain, without a specified underlying cause. It indicates a sudden onset of lymph node enlargement due to infection or inflammation, where the specific pathogen or etiology is not identified.

Use this code when documentation clearly states "acute lymphadenitis" but does not specify the anatomical location (e.g., cervical, axillary, inguinal) or the causative agent. This is appropriate when the provider's assessment is limited to the general diagnosis of acute lymph node inflammation without further detail.

• Avoid using this code if the anatomical site of the lymphadenitis is documented; instead, use a more specific code from the L04.0-L04.8 series.
• Do not use if a specific infectious agent (e.g., streptococcal, staphylococcal) is identified; code the specific infection.
• Consider querying the provider for more specific documentation regarding location or etiology if available in the clinical notes.