Doctor's Hospital at Renaissance is seeking to double the number of beds at its main campus within the next two years, but only if federal regulators bless its plan. There are 513 licensed beds at the main campus and the application seeks to expand to 1,102 beds — large enough to become the biggest hospital in the Rio Grande Valley. The planned expansion is expected to cost $200 million. For DHR to expand, it must petition the Centers for Medicare and Medicaid Services to allow its growth — a restriction enacted under the Affordable Care Act that prevents doctor-owned hospitals from expanding without government approval.