Meet our Team
FOUNDER & PRESIDENT
dr. Shane Whitlock
Dr. Michael Shane Whitlock, MD, is a diagnostic radiologist with Luneta Radiology LLC who brings more than two decades of clinical experience to our team. He has also served in a leadership role as Chief of Radiology for Mountain Home Radiology Consultants. Dr. Whitlock completed his Diagnostic Radiology residency at the University of Arkansas, followed by a fellowship in Musculoskeletal Imaging at the University of Washington, and maintains active medical licenses across ten states.
Dr. Matthew stadnyk
Dr. Matthew Stadnyk, MD, is a diagnostic radiologist and teleradiologist with Luneta Radiology LLC. He earned his medical degree from the University of Missouri-Kansas City School of Medicine, completed a general surgery internship at St. Luke’s Hospital in Kansas City, and went on to complete his diagnostic radiology residency at St. Louis University Hospital. Dr. Stadnyk brings extensive experience in radiology and is licensed to practice in multiple states.
Dr. Jesus Contrares
Dr. Michael Stadnyk
Dr. Stadnyk is a board-certified radiologist with over 25 years of clinical experience across academic medicine, hospital systems, and private practice. He earned his M.D. from the University of Missouri–Kansas City and completed his residency in radiology at St. Louis University Hospital. His expertise spans MRI, CT, ultrasound, breast imaging, trauma imaging, and general diagnostic radiology. Dr. Stadnyk most recently served as the Chief Medical Officer for a teleradiology company. A past president of the St. Louis Metropolitan Medical Society and the Greater St. Louis Society of Radiologists, Dr. Stadnyk has held multiple leadership roles in organized medicine and medical education. Passionate about advancing patient care, Dr. Stadnyk combines deep clinical expertise with a commitment to innovation and physician leadership.
full time physicians
Dr. Jesus Sanchez Contreras, DO, is a diagnostic radiologist with Luneta Radiology LLC who brings extensive clinical experience to our team. He has a broad background in teleradiology, with experience serving healthcare facilities across Missouri, Maryland, Tennessee, and Colorado. Dr. Contreras completed his Diagnostic Radiology residency at PHH/Hemet Valley Medical Center, followed by a fellowship in Pediatric Radiology at Lucile Packard Children’s Hospital Stanford, and maintains active medical licenses across seventeen states.
Dr. Jessa Tunacao
Dr. Tom schroyer
Dr. Thomas Melvin Schroyer Jr., MD, is a diagnostic radiologist with Luneta Radiology LLC who brings extensive experience to our team. He completed his internship at Forest Park Hospital before completing his Diagnostic Radiology residency at Saint Louis University School of Medicine. Dr. Schroyer also brings prior experience from Ernst Radiology Clinic, Inc. and maintains active medical licenses across multiple states.
Dr. Monica Drylewicz
Dr. Monica Drylewicz, MD, is a diagnostic radiologist specializing in abdominal imaging with Luneta Radiology LLC. She completed her Internal Medicine internship and Diagnostic Radiology residency at Washington University School of Medicine/Barnes-Jewish Hospital, followed by a fellowship in Abdominal Imaging at the Mallinckrodt Institute of Radiology at Washington University. Dr. Drylewicz maintains active medical licenses across multiple states and brings specialized imaging expertise to the Luneta Radiology team.
Dr. Jessa M. Tunacao, MD, is a diagnostic radiologist specializing in teleradiology and musculoskeletal radiology with Luneta Radiology LLC. She completed her Diagnostic Radiology residency through the Zucker School of Medicine/Northwell Health at Mather Hospital and fellowships in Imaging Informatics at the University of Pennsylvania and Musculoskeletal Radiology at Thomas Jefferson University Hospital. Dr. Tunacao maintains medical licenses across multiple states and brings specialized expertise in musculoskeletal imaging and imaging technology to the Luneta Radiology team.
CHIEF MEDICAL OFFICER
Dr. Joseph Atumonye
Dr. Joseph Atumonye, MD, is a diagnostic radiologist specializing in neuroradiology with Luneta Radiology LLC. He completed his Internal Medicine internship at AdventHealth Redmond before completing his Diagnostic Radiology residency at the University of Miami Hospital/Jackson Health System. Dr. Atumonye went on to complete a fellowship in Neuroradiology at the University of Miami and maintains active medical licenses across multiple states.
Dr. Robert fischer
Dr. Robert Fischer, MD, is a diagnostic radiologist specializing in vascular and interventional radiology with Luneta Radiology LLC. He completed his Internal Medicine internship and Diagnostic Radiology residency at Wake Forest University Baptist Medical Center, followed by a fellowship in Vascular & Interventional Radiology at the University of New Mexico Hospital. Dr. Fischer maintains active medical licenses across multiple states and brings specialized expertise to the care he provides through Luneta Radiology.
Dr. Sammer Jazbeh
Dr. Sammer Jazbeh, MD, is a diagnostic radiologist specializing in MRI and diagnostic neuroimaging with Luneta Radiology LLC. He completed his Internal Medicine residency at Advocate Christ Medical Center/University of Illinois at Chicago, followed by his Diagnostic Radiology residency at the University of Oklahoma Health Sciences Center. Dr. Jazbeh went on to complete a fellowship in Magnetic Resonance Imaging at the University of California, San Diego, and maintains active medical licenses across multiple states.
Dr. Laura Sievert
Dr. Laura Jane Sievert, MD, is a diagnostic radiologist specializing in pediatric radiology with Luneta Radiology LLC. She completed her Diagnostic Radiology residency at the University of Missouri-Columbia School of Medicine. Dr. Sievert went on to complete a fellowship in Pediatric Radiology at the Mallinckrodt Institute of Radiology at Washington University and maintains active medical licenses across multiple states.