Non-Hodgkin lymphoma, unspecified, intrathoracic lymph nodes

This code signifies a diagnosis of non-Hodgkin lymphoma where the specific histological subtype is not documented or determined, and the primary site of involvement is within the intrathoracic lymph nodes. This includes lymph nodes located in the mediastinum, hila, and other areas within the chest cavity.

Use this code when documentation confirms non-Hodgkin lymphoma affecting intrathoracic lymph nodes, but the pathologist has not specified the exact type (e.g., diffuse large B-cell, follicular). This is appropriate for initial diagnoses where further subtyping is pending or when the subtype remains unknown after workup.

• Avoid using this code if a more specific histological subtype of non-Hodgkin lymphoma is documented (e.g., C83.3- for diffuse large B-cell lymphoma).
• Ensure documentation clearly states "intrathoracic lymph nodes" or specifies locations within the chest.
• Consider an additional code for any associated symptoms or complications, if applicable.