Oth types of non-Hodgkin lymphoma, intra-abd lymph nodes

This code signifies a diagnosis of non-Hodgkin lymphoma that does not fit into more specific categories, with the primary site of involvement being the lymph nodes located within the abdominal cavity. This includes various rare or unclassifiable subtypes of non-Hodgkin lymphoma affecting mesenteric, retroperitoneal, or other intra-abdominal lymph node groups.

Use this code when the pathology report confirms a non-Hodgkin lymphoma diagnosis and specifies an "other" or "unspecified" type, with clear documentation of involvement of intra-abdominal lymph nodes. This code is appropriate when more specific sub-classifications of non-Hodgkin lymphoma (e.g., follicular, diffuse large B-cell) are not identified or are explicitly ruled out, but the anatomical location is confirmed.

• Ensure documentation clearly states "intra-abdominal lymph nodes" as the primary site of involvement.
• Do not use if a more specific type of non-Hodgkin lymphoma (e.g., C82.-, C83.-, C84.-) is identified, even if intra-abdominal.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any associated manifestations or complications.