Hodgkin lymphoma, unsp, lymph nodes of head, face, and neck

This code signifies a diagnosis of Hodgkin lymphoma where the specific subtype is not documented, and the disease is localized to the lymph nodes within the head, face, or neck regions. It indicates a primary lymphatic malignancy affecting these superficial cervical, supraclavicular, or preauricular nodes.

Use this code when the medical record confirms a diagnosis of Hodgkin lymphoma, but the pathologist has not specified the histological subtype (e.g., nodular sclerosis, mixed cellularity). This code is appropriate when imaging or biopsy definitively identifies involvement of lymph nodes in the head, face, or neck, and no other sites are documented.

• Ensure documentation explicitly states "Hodgkin lymphoma" and specifies involvement of head, face, or neck lymph nodes without further subtyping.
• Avoid using this code if a specific subtype of Hodgkin lymphoma (e.g., nodular sclerosis, mixed cellularity) is documented; instead, use the more specific C81.1-C81.7 codes.
• If the lymphoma is documented as involving multiple sites, including head/face/neck, and the specific subtype is unknown, consider codes for unspecified sites (e.g., C81.90) or more generalized involvement if applicable.