Oth types of non-Hodgkin lymphoma, unspecified site

This code signifies a diagnosis of non-Hodgkin lymphoma that does not fit into more specific categories of NHL, such as follicular, diffuse large B-cell, or mantle cell lymphoma, but has been further characterized beyond "unspecified type." It indicates that the pathologist or clinician has identified specific features or a subtype of NHL that is not otherwise classified in ICD-10-CM.

Use this code when documentation specifies a type of non-Hodgkin lymphoma that is not explicitly listed elsewhere in the C82-C85 range, and the primary site of the lymphoma is not documented or is unknown. This often occurs with rare or newly recognized NHL subtypes, or when the pathology report provides a descriptive diagnosis that doesn't map directly to a more specific ICD-10-CM code.

• Ensure the documentation clearly states a specific type of non-Hodgkin lymphoma that is not classifiable to a more precise code (e.g., "T-cell rich B-cell lymphoma" or "primary cutaneous anaplastic large cell lymphoma, not otherwise specified").
• Avoid using this code if a more specific type of non-Hodgkin lymphoma (e.g., follicular, diffuse large B-cell) is documented.
• If the primary site of the lymphoma is known, a more specific code from C85.8- with a site indicator (e.g., C85.81 for lymph nodes) should be used instead.