General and Vascular Surgeons
Logan Warren, DO
Dr. Marshall Logan Warren is a general and vascular surgeon specializing in advanced, minimally invasive care for patients with vascular disease. He completed his undergraduate education at Texas State University and earned his Master of Science and medical degree from the Texas College of Osteopathic Medicine. Dr. Warren completed his general surgery residency at Texas Tech University, followed by advanced vascular surgery training at the University of Oklahoma.
Dr. Warren’s clinical focus includes the endovascular and surgical treatment of arterial and venous disorders, with particular expertise in complex peripheral interventions, limb salvage, and the management of limb-threatening wounds. Dr. Warren enjoys spending time with his wife and children. Outside of work, his interests include training his bird dog, running, reading, and participating in outdoor activities such as hunting, shooting sports, and coastal fishing.
Mario Rossbach, MD, FACS
Dr. Rossbach is a board-certified general surgeon with subspecialty expertise in vascular and minimally invasive surgery, practicing in New Braunfels since 2001. He completed his residency at the University of Texas Health Science Center at San Antonio, followed by advanced training in minimally invasive and vascular surgery, and previously practiced as a peripheral vascular surgeon in Sheffield, England.
Dr. Rossbach specializes in peripheral vascular and endovascular procedures, including carotid artery revascularization, aneurysm repair, dialysis access, and arterial and venous disease management. He is a Fellow of the American College of Surgeons and a Clinical Professor of Surgery at the UT Health Science Center. Outside of work, Dr. Rossbach enjoys road cycling, reading history, and spending time with his family and friends. He is fluent in English, Spanish, German, and Italian.