Dr. Gregory M. Jackson is a family medicine doctor in San Antonio, Texas and is affiliated with Methodist Hospital-San Antonio. He received his medical degree from Autonomous University of Tamaulipas Faculty of Medicine and has been in practice for more than 20 years. Dr. Gregory M. Jackson has expertise in treating coronary artery disease, hypertension & high blood pressure, aneurysm, among other conditions - see all areas of expertise. Dr. Gregory M. Jackson accepts Medicare, Aetna, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.