Non-follicular (diffuse) lymphoma, unsp, unspecified site

This code signifies a malignant neoplasm originating from lymphocytes, characterized by a diffuse growth pattern rather than a follicular one. It represents a broad category of lymphomas where the specific histological subtype is not yet determined or documented.

Assign this code when documentation confirms a diagnosis of non-follicular (diffuse) lymphoma, but the specific type (e.g., diffuse large B-cell lymphoma, peripheral T-cell lymphoma) and the primary anatomical site are not specified. This is often an initial diagnosis before further pathology results are available.

• Avoid using this code if a more specific histological type of non-follicular lymphoma is documented (e.g., C83.3- for diffuse large B-cell lymphoma).
• Always query the provider for clarification on the specific type and primary site if possible, to allow for more precise coding.
• This code should be followed by codes for any associated signs, symptoms, or complications, if applicable.