Localized enlarged lymph nodes

This code signifies the presence of palpable, abnormally enlarged lymph nodes confined to a specific anatomical region. It indicates a localized inflammatory or reactive process, rather than a generalized lymphadenopathy. The enlargement is typically due to an immune response to infection or inflammation in the drainage area.

Use this code when documentation specifies enlarged lymph nodes in a single region, such as cervical, axillary, or inguinal, without evidence of widespread involvement. Supporting documentation includes physical exam findings noting localized lymphadenopathy, and imaging reports confirming regional enlargement.

• Do not use this code if the cause of the lymphadenopathy is known and a more specific code exists (e.g., infectious mononucleosis, lymphoma).
• Distinguish from generalized lymphadenopathy (R59.1), which involves enlargement in two or more non-contiguous lymph node regions.
• Always code the underlying cause of the localized enlarged lymph nodes if identified and documented.