Personal history of immune checkpoint inhibitor therapy

This code indicates that a patient has previously received treatment with an immune checkpoint inhibitor. These therapies work by blocking proteins that prevent the immune system from attacking cancer cells, thereby enhancing the body's natural anti-tumor response. This history is important for ongoing patient management and understanding potential long-term effects or future treatment considerations.

Use this code when documenting a patient's past medical history of having undergone immune checkpoint inhibitor therapy, regardless of the specific agent used or the outcome of the treatment. This is relevant for patients who are now in remission, undergoing surveillance, or receiving subsequent treatments for cancer or other conditions. It should be assigned as a secondary diagnosis to provide a complete picture of the patient's treatment history.

• Assign this code as a secondary diagnosis to provide historical context for the patient's care.
• Do not use this code for current immune checkpoint inhibitor therapy; instead, use codes for ongoing drug therapy (e.g., Z79.6-).
• Ensure documentation clearly states the patient has a history of receiving this type of therapy, not just a consideration for future treatment.