Cutaneous T-cell lymphoma, unsp, intrathoracic lymph nodes

This code signifies a diagnosis of cutaneous T-cell lymphoma (CTCL) where the specific subtype is not documented, and the disease has spread to the lymph nodes located within the chest cavity. CTCL is a rare type of non-Hodgkin lymphoma that primarily affects the skin but can disseminate to other organs, including lymph nodes.

Use this code when documentation confirms a diagnosis of cutaneous T-cell lymphoma with involvement of intrathoracic lymph nodes, but the specific type of CTCL (e.g., Mycosis Fungoides, Sézary Syndrome) is not specified. This code is appropriate when imaging studies (e.g., CT scan, PET scan) or biopsy results confirm intrathoracic lymph node involvement in a patient with CTCL.

• Ensure documentation clearly states "intrathoracic lymph nodes" and not just "lymph nodes" to support this specific site.
• If the specific subtype of cutaneous T-cell lymphoma is known (e.g., Mycosis Fungoides), a more specific code from the C84.0- or C84.1- series should be used.
• Always sequence the primary diagnosis of CTCL first, followed by codes for any associated symptoms or complications.