Bone marrow transplant rejection

This code signifies the body's immune system attacking and damaging the transplanted bone marrow. This adverse reaction occurs when the recipient's immune cells recognize the donor's cells as foreign, leading to a rejection response. It can manifest in various forms, from mild to severe, and can be life-threatening.

Apply this code when documentation clearly indicates that a patient who has undergone a bone marrow transplant is experiencing rejection of the transplanted marrow. This includes both acute and chronic rejection episodes, as long as the primary issue is the rejection itself. Use this code when the transplant is failing due to an immunological response against the donor cells.

• Always confirm the diagnosis of bone marrow transplant rejection is explicitly stated by the provider.
• Do not use this code for other complications of bone marrow transplant, such as infection or graft-versus-host disease (unless rejection is also present).
• Consider additional codes for specific manifestations or complications of the rejection, if documented.