In simple words: This code is for problems that happen after someone gets an organ or tissue transplant.It needs extra codes to say which organ or tissue and what the problem is, such as rejection, infection, or other issues.

This code encompasses complications arising from transplanted organs or tissues.It requires additional codes to specify the organ or tissue transplanted (e.g., kidney, heart, liver, bone marrow) and the nature of the complication (e.g., rejection, infection, failure).Examples of complications include graft-versus-host disease, malignancy associated with organ transplant, and post-transplant lymphoproliferative disorders (PTLD).

Example 1: A 55-year-old male patient received a kidney transplant six months ago. He presents with fever, elevated creatinine levels, and tenderness over the transplant site, suggesting kidney transplant rejection (T86.11)., A 40-year-old female patient who underwent a liver transplant one year ago develops an opportunistic infection (e.g., cytomegalovirus) due to immunosuppression (T86.43, with additional code for the specific infection)., A 60-year-old patient with a history of heart transplant experiences a cardiac allograft vasculopathy (T86.290), requiring additional diagnostic and therapeutic interventions.

Detailed medical history of the transplant, including the type of transplant, date of transplant, immunosuppression regimen, laboratory results (e.g., blood counts, organ function tests, serologies for infections), imaging studies (e.g., ultrasound, CT, MRI) to assess transplant function and identify complications.Complete documentation of the clinical presentation, diagnostic findings, treatment plan, and response to treatment is essential.

** This code is part of a broader category that includes complications of various other medical procedures and devices.Always refer to the official ICD-10-CM coding manual for the most up-to-date information and guidelines.