The research study is being conducted to learn how well a test called Prospera can detect rejection in a transplanted kidney after a biopsy. If results of the biopsy do not indicate rejection, the study team will follow your condition by reviewing your clinical visits for one year, at which point relevant medical history will be collected. If the biopsy results indicate rejection, you will have follow-up blood draws every 2 weeks for at least 8 weeks or until treatment is stopped, whichever is longer. Treatment for active rejection may range from days to several weeks depending on the treatment approach taken. Treatment for active rejection is typically 4-6 weeks. If treatment is longer, the study team would not continue blood draws past 10 weeks. The study team will review your clinical visits for one year, at which point relevant medical history will be collected

You may be eligible for this study if you meet the following criteria:

• Conditions: Kidney Transplant Rejection
• Age: 18 years - 99 years
• Gender: All