Follicular lymphoma, unspecified, intrathoracic lymph nodes

This code signifies a diagnosis of follicular lymphoma, a slow-growing type of non-Hodgkin lymphoma, when the specific subtype is not documented. The disease is located within the intrathoracic lymph nodes, which are lymph nodes found within the chest cavity. This indicates the primary site of involvement for the lymphoma.

This code is appropriate when the medical record clearly states a diagnosis of follicular lymphoma affecting the intrathoracic lymph nodes, but the grade or specific subtype (e.g., grade I, II, III) is not specified by the physician. It should be used when documentation confirms the presence of follicular lymphoma in the chest, without further histological detail.

• Do not use this code if the specific grade of follicular lymphoma (e.g., grade I, II, III) is documented; instead, select the more specific code.
• Ensure the documentation explicitly identifies "intrathoracic lymph nodes" as the site of involvement.
• Sequence this code as the primary diagnosis when the patient is admitted for treatment of this specific lymphoma.