Welcome! Diagnostic Clinic of Longview (DCOL) appreciates the opportunity to serve the healthcare needs of East Texas. For more than 35 years our goal has been to provide the most comprehensive care and range of services available in the area. Now, through our partnership with Longview Regional Medical Center, we can inspire even more trust in our patients and the community. DCOL is a multi-specialty physician group practice consisting of more than 130 physicians and mid-level providers in 18 locations. Our principal focus is in the delivery of primary care services including Pediatrics and Adolescent Medicine, Obstetrics/Gynecology, Family Practice and Internal Medicine -- though recent additions to the group have included a wide array of medical specialists.