PHD meaning in Medical ?

Texas Health Presbyterian Hospital Dallas (Texas Health Dallas, Presbyterian, or Presby) is a teaching hospital and tertiary care facility in the United States, located in the Vickery Meadow area of Dallas, Texas. It is the flagship institution of 29 hospitals in Texas Health Resources, the largest healthcare system in North Texas and one of the largest in the United States. The hospital, which opened in 1966, has 875 beds and around 1,200 physicians. The hospital is the largest business within Vickery Meadow. In 2008, the hospital implemented a program in which critical care physician specialists are available to patients in the medical and surgical intensive care units 24 hours a day, eliminating ventilator-associated pneumonia, central line infections and pressure ulcers. The hospital has maintained an active internal medicine residency training program since 1977, and hosts rotating medical students from University of Texas Southwestern Medical Center.