Raul Santos M.D., P.A.

Dr. Santos received his undergraduate degree at the University of North Texas in Denton and his medical degree at the University of Texas Medical Branch, Galveston. He went on to complete his residency in Internal Medicine at Cedars-Sinai Medical Center in Los Angeles and his fellowship in cardiology at Scott & White Medical Center in Temple, Texas.

Dr. Santos is board certified in Internal Medicine, Cardiovascular Disease, and Interventional Cardiology.

Dr. Santos is married with two children.

Dr. Santos sees patients at the Grapevine Office and the Plano Office.

Phillip Hecht, M.D., P.A., F.A.C.C.

Dr. Hecht received his undergraduate degree at the University of Texas and his medical degree at the University of Texas Medical Branch, Galveston. He went on to complete his residency in Internal Medicine and his fellowship in Cardiology at Baylor University Medical Center in Dallas.

Dr. Hecht is board certified in Internal Medicine and Cardiovascular Disease. He is a Fellow of the American College of Cardiology and a member of the Texas Medical Association.

Dr. Hecht sees patients at the Grapevine Office and the Plano Office.

J.W. Randolph Lawson, M.D., P.A., F.A.C.C.

Dr. Lawson received his undergraduate degree at American University in Washington D.C. and his medical degree from the University of Virginia. He then went on to complete his residency in Internal Medicine at the Medical University of SC Hospitals in Charleston, SC and his fellowship in Cardiology at the University of Texas, Southwestern Medical Center in Dallas.

Dr. Lawson is board certified in Cardiovascular Disease. He is a Fellow of the American College of Cardiology and a Diplomat of the American Board of Internal Medicine and the National Board of Medical Examiners.

Dr. Lawson is married and has five children.

Dr. Lawson sees patients at the Grapevine Office and the Plano Office.

Thomas Waller, M.D., P.A.

Dr. Waller received his undergraduate degree at Texas A&M University and his medical degree at the University of Texas Southwestern in Dallas. He then went on to complete his residency in Internal Medicine at Parkland, University of Texas Southwestern and his fellowship in Cardiovascular Disease at Baylor University Medical Center in Dallas.

Dr. Waller is board certified in Cardiovascular Disease. He is a member of the Texas Medical Association and the Collin-Fannin County Medical Society.

Dr. Waller is married and has a son and a daughter. When he has time he enjoys gardening and fishing.

Dr. Waller sees patients at the Plano Office.

David Scherer, M.D., P.A., F.A.C.C.

Dr. Scherer received his undergraduate degree and his medical degree from Texas A&M University.  He then went on to complete his residency in Internal Medicine and his fellowship in Cardiology at Texas A&M College of Medicine (Scott & White Memorial Hospital) in Temple, Texas.

Dr. Scherer is board certified in Internal Medicine and Cardiovascular Disease.  He is a Fellow of the American College of Cardiology and is a member of the American College of Physicians, the American Medical Association and the Texas Medical Association.

Dr. Scherer is married and has two sons and a daughter. He enjoys competitive running and spending time with his children.

Dr. Scherer sees patients at the Grapevine Office and the Flower Mound Office.

Trent Pettijohn, M.D., P.A., F.A.C.C.

Dr. Pettijohn received his undergraduate degree from the University of Texas and his medical degree from the Texas Tech University School of Medicine.  He then went on to complete his residency in Internal Medicine and fellowship in Cardiology at the Texas A&M College of Medicine (Scott & White Memorial Hospital) in Temple, Texas.

Dr. Pettijohn is board certified in cardiovascular disease and in interventional cardiology.  He is a Fellow of the American College of Cardiology and is a member of the American Medical Association, the Texas Medical Association and the American College of Physicians.

Dr. Pettijohn and is married and has three daughters.  He enjoys caddying for his daughters as they play golf.

Dr. Pettijohn sees patients at the Plano Office.