Cutan T-cell lymphoma, unsp nodes of head, face, and neck

This code describes a type of non-Hodgkin lymphoma originating from T-lymphocytes that primarily affects the skin, with involvement of unspecified lymph nodes located in the head, face, or neck region. It signifies a systemic spread of cutaneous T-cell lymphoma beyond the skin to regional lymphatics in these specific anatomical areas.

Assign this code when documentation confirms a diagnosis of cutaneous T-cell lymphoma with evidence of metastasis or involvement of lymph nodes in the head, face, or neck, but without specific identification of which lymph nodes are affected. Supporting documentation would include pathology reports confirming CTCL and imaging or clinical notes indicating lymphadenopathy in the specified regions.

• Ensure the documentation explicitly states "unspecified" lymph nodes within the head, face, or neck. If specific lymph nodes are identified, a more precise code should be used.
• This code should be sequenced as a primary diagnosis when the CTCL and its lymph node involvement are the reason for the encounter.
• Distinguish from codes for CTCL without lymph node involvement or with involvement of lymph nodes in other body regions.