Follicular lymphoma, unspecified, intrapelvic lymph nodes

This code signifies a diagnosis of follicular lymphoma, a slow-growing type of non-Hodgkin lymphoma, when the specific grade or subtype is not documented. The primary site of involvement for this diagnosis is the lymph nodes located within the pelvic region.

Apply this code when documentation confirms follicular lymphoma affecting intrapelvic lymph nodes, but the pathology report or clinical notes do not specify the grade (e.g., grade 1, 2, 3, or transformed). This code is appropriate when the physician explicitly states "follicular lymphoma, unspecified" or similar language, with clear indication of pelvic lymph node involvement.

• Ensure documentation clearly specifies "intrapelvic lymph nodes" as the affected site. If other sites are involved, additional codes may be necessary.
• Avoid using this code if a specific grade of follicular lymphoma is documented; instead, select the appropriate C82.0-C82.8 code.
• Always review the pathology report for the most specific diagnosis of follicular lymphoma, including grade and any transformation.