Follicular lymphoma grade II, unspecified site

This code identifies a specific type of non-Hodgkin lymphoma, follicular lymphoma, which is characterized by a grade II cellular architecture. It indicates that the primary site of the lymphoma has not been specified in the medical record. Follicular lymphoma is a slow-growing (indolent) B-cell lymphoma.

Use this code when the pathology report confirms follicular lymphoma, grade II, but the physician documentation does not specify the anatomical location of the tumor. This typically occurs when the diagnosis is made from a biopsy without further staging information regarding the primary site.

• Always seek clarification from the provider if the primary site of the follicular lymphoma is not documented.
• Do not use this code if a specific anatomical site (e.g., lymph nodes of head, neck, and trunk) is documented; instead, use a more specific C82.1- subcategory.
• Sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.