Oth types of foliclar lymph, nodes of head, face, and neck

This code signifies a diagnosis of follicular lymphoma that does not fit into the common classifications (e.g., grades 1, 2, 3, or diffuse components), specifically when the disease is located in the lymph nodes of the head, face, or neck region. This "other types" category is used for rare or unclassifiable variants of follicular lymphoma.

Use this code when documentation specifies follicular lymphoma of an "other" or "unspecified" type, with clear localization to the lymph nodes of the head, face, or neck. This diagnosis is typically confirmed by pathology reports detailing the specific follicular lymphoma subtype and its anatomical site.

• Ensure the pathology report explicitly states "other types" or a specific rare variant of follicular lymphoma that falls outside the standard grading.
• Verify the anatomical site is precisely documented as lymph nodes of the head, face, or neck; do not use for other body regions.
• Distinguish from C82.0-C82.7, which specify graded follicular lymphomas or those with diffuse components.