Other Hodgkin lymphoma, intrapelvic lymph nodes

This code signifies a diagnosis of Hodgkin lymphoma that does not fit into the classic or nodular lymphocyte-predominant subtypes, and is specifically located within the lymph nodes of the pelvic region. This includes any Hodgkin lymphoma variant other than those explicitly classified elsewhere, presenting in areas such as the iliac, obturator, or sacral lymph nodes.

Apply this code when documentation confirms a diagnosis of Hodgkin lymphoma, specified as "other" or unclassifiable into classic or nodular lymphocyte-predominant types, and the primary site of involvement is clearly identified as intrapelvic lymph nodes. Supporting documentation would include pathology reports detailing the specific Hodgkin lymphoma subtype and imaging or surgical reports confirming pelvic lymph node involvement.

• Ensure the pathology report explicitly rules out classic Hodgkin lymphoma (CHL) and nodular lymphocyte-predominant Hodgkin lymphoma (NLPHL) before using this "other" category.
• Verify the anatomical site is definitively intrapelvic; do not use for retroperitoneal or inguinal lymph node involvement.
• Always sequence this code after any codes for the specific histological type of Hodgkin lymphoma, if known and separately coded (e.g., C81.9- for unspecified type).