Oth mature T/NK-cell lymph, nodes of ing rgn and lower limb

This code signifies a diagnosis of a mature T-cell or natural killer (NK)-cell lymphoma that doesn't fit into more specific categories, specifically affecting the lymph nodes located in the inguinal region and lower limb. These are aggressive non-Hodgkin lymphomas originating from mature T or NK lymphocytes.

Apply this code when documentation confirms a diagnosis of an "other" mature T/NK-cell lymphoma, with specific involvement of lymph nodes in the groin, thigh, or leg. This diagnosis typically follows biopsy and histopathological examination, often with immunophenotyping.

• Ensure the pathology report explicitly states "other mature T/NK-cell lymphoma" and specifies inguinal or lower limb lymph node involvement.
• Do not use for lymphomas with a more specific ICD-10-CM code (e.g., peripheral T-cell lymphoma, NOS).
• Code any associated symptoms or complications as secondary diagnoses.