Hodgkin lymphoma, unspecified, intrathoracic lymph nodes

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 chest cavity. This is a malignant neoplasm originating from lymphocytes, characterized by the presence of Reed-Sternberg cells, affecting the intrathoracic lymphatic system.

Apply this code when the medical record confirms a diagnosis of Hodgkin lymphoma affecting intrathoracic lymph nodes, but the pathologist or clinician has not specified the histological subtype (e.g., nodular sclerosis, mixed cellularity). This code is appropriate when documentation explicitly states "Hodgkin lymphoma, intrathoracic lymph nodes, unspecified type."

• Avoid using this code if a more specific subtype of Hodgkin lymphoma (e.g., C81.12, C81.22) is documented.
• Ensure documentation clearly specifies "intrathoracic lymph nodes" and not other sites.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.