Mature T/NK-cell lymph, unsp, nodes of head, face, and neck

This code signifies a diagnosis of mature T-cell or NK-cell lymphoma where the specific subtype is not identified, and the disease is located in the lymph nodes of the head, face, or neck region. These are aggressive non-Hodgkin lymphomas originating from mature T-lymphocytes or natural killer cells.

Use this code when the pathology report confirms a mature T/NK-cell lymphoma, but further subtyping (e.g., anaplastic large cell lymphoma, peripheral T-cell lymphoma, NOS) is not specified or documented. The documentation must clearly indicate involvement of lymph nodes in the head, face, or neck.

• Ensure the documentation explicitly states "unspecified" or "NOS" for the mature T/NK-cell lymphoma subtype.
• Verify the anatomical site of involvement is precisely limited to lymph nodes of the head, face, or neck.
• Do not use if a more specific subtype of mature T/NK-cell lymphoma is identified in the pathology report.