Non-Hodgkin lymphoma, unsp, extranodal and solid organ sites

This code signifies a malignant proliferation of lymphocytes that originates outside of the lymphatic system, affecting solid organs or other extranodal sites. The specific type of non-Hodgkin lymphoma is not identified, and the primary site of involvement is not a lymph node.

This code is appropriate when documentation confirms a diagnosis of non-Hodgkin lymphoma with extranodal or solid organ involvement, but the pathologist or clinician has not specified the exact subtype (e.g., diffuse large B-cell, follicular). It is used when the primary tumor is found in organs such as the gastrointestinal tract, skin, bone, or central nervous system, and no further specificity is available.

• Avoid using this code if a more specific subtype of non-Hodgkin lymphoma (e.g., C83.3- for diffuse large B-cell lymphoma) is documented.
• Ensure documentation clearly states extranodal or solid organ involvement; otherwise, a code for unspecified nodal involvement (C85.90) may be more appropriate.
• Always query the provider for greater specificity regarding the lymphoma subtype and primary site if not clearly documented.