Non-Hodgkin lymphoma, unspecified, unspecified site

This code represents a malignant neoplasm of the lymphatic system, specifically a non-Hodgkin lymphoma, where the specific type of lymphoma (e.g., diffuse large B-cell, follicular) has not been determined or documented. It also indicates that the primary anatomical site of the lymphoma is not specified.

Use this code when the medical record clearly diagnoses non-Hodgkin lymphoma, but the pathologist or clinician has not yet specified the exact histological subtype. It is also appropriate when the primary site of origin is unknown or not documented. This code should be considered a temporary or placeholder diagnosis until more specific information becomes available.

• Avoid using this code if a more specific histological type of non-Hodgkin lymphoma is documented (e.g., C83.30 for diffuse large B-cell lymphoma).
• Always query the provider for a more specific diagnosis if possible, as this code lacks clinical specificity for treatment planning and prognosis.
• If the site is known but the type is not, use the appropriate C85.9- code with a specified site (e.g., C85.91 for non-Hodgkin lymphoma, unspecified, lymph nodes of head, face, and neck).