Peripheral T-cell lymphoma, NEC, in remission

This code signifies a diagnosis of peripheral T-cell lymphoma (PTCL) that does not fit into other specific PTCL categories, and the disease is currently in remission. PTCL is a diverse group of aggressive non-Hodgkin lymphomas originating from mature T-cells, often presenting with lymphadenopathy, B symptoms, and extranodal involvement.

Apply this code when a patient has a documented history of peripheral T-cell lymphoma, not otherwise specified, and clinical assessment confirms the absence of active disease. Documentation should clearly state "in remission" or similar terminology following treatment.

• Always confirm the specific type of PTCL if possible; this code is for "not elsewhere classified" cases.
• Ensure documentation explicitly states the remission status; active disease would require a different code.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is related to follow-up care, surveillance, or management of treatment side effects.