Non-Hodgkin lymphoma, unspecified, intrapelvic lymph nodes

This code signifies a diagnosis of non-Hodgkin lymphoma where the specific type of lymphoma is not documented, and the primary or most significant site of involvement is within the intrapelvic lymph nodes. This indicates a malignant proliferation of lymphoid cells originating in or primarily affecting lymph nodes located within the pelvic cavity.

Use this code when documentation confirms a diagnosis of non-Hodgkin lymphoma without further specification of the histological type (e.g., diffuse large B-cell, follicular) and explicitly states involvement of intrapelvic lymph nodes. This is appropriate when the physician has not yet determined or documented the specific subtype of NHL.

• Avoid using this code if a more specific type of non-Hodgkin lymphoma is documented; always code to the highest level of specificity.
• Ensure documentation clearly specifies "intrapelvic lymph nodes" as the primary site of involvement. If other sites are involved, consider additional codes for those sites.
• This code is for an unspecified type of NHL. If the type is known but the site is unspecified, a different code from the C82-C85 range would be more appropriate.