This is a multicenter, non-blinded, prospective observational cohort study of 1000 patients enrolled in an AlloSure testing registry, including 300 patients at centers with planned renal surveillance biopsies at 12 months post-transplantation. The other 700 patients will be from centers that do not perform protocol surveillance biopsies. This registry study does not provide any medical care. Outcomes in this sub-cohort, which represents the majority of the intended use population in the U.S., will be compared to the outcomes of the test and control cohorts. A matched control cohort of 300 patients will be retrospectively selected from the subset of centers providing the test cohort patients who have planned surveillance biopsies at 12 months post-transplantation.

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

• Conditions: TBD, tbd, tbd
• Age: 99 years or below
• Gender: All