Oth mature T/NK-cell lymph, nodes of head, face, and neck

This code signifies a diagnosis of a mature T-cell or NK-cell lymphoma that doesn't fit into more specific categories, and is specifically located in the lymph nodes of the head, face, or neck region. These are aggressive non-Hodgkin lymphomas originating from mature T-lymphocytes or natural killer cells.

Use this code when documentation confirms a diagnosis of an "other" specified mature T/NK-cell lymphoma, with clear indication of involvement solely within the lymph nodes of the head, face, or neck. This applies when the specific subtype of T/NK-cell lymphoma is not precisely defined but is known to be mature and located in these anatomical sites.

• Ensure the documentation specifies "other" mature T/NK-cell lymphoma and not a more specific subtype.
• Verify the anatomical location is explicitly limited to lymph nodes of the head, face, or neck.
• Do not use if the lymphoma is described as immature or if the primary site is outside the specified lymph node regions.