Our Team
At Ultimate Male, our team is made up of well-qualified professionals who bring both advanced training and genuine compassion to every patient interaction. Equipped with the latest in men's wellness technologies and treatments, our team offers compassionate care that's both modern and effective. What truly sets us apart is our commitment to building real connections. We take the time to get to know each patient personally, understanding their goals, concerns, and lifestyle, so we can deliver care that feels customized and sincere. Every visit is an opportunity for us to offer support, uplift, and guide you toward lasting confidence and optimal health.
Matthew A. Schafer, PA-C
Lead Provider
Matthew A. Schafer brings a wealth of experience to the world of men's health. With over 15 years of frontline medical service as an EMT and paramedic, Matthew has a strong foundation in emergency care and acute medical response. He earned his Master of Physician Assistant Studies from Rocky Mountain University of Health Professions in Provo, UT, and has since expanded his focus to include advanced men's wellness. His practice offers expertise in testosterone replacement therapy, erectile dysfunction, and aesthetic treatments. A native of Los Angeles County, he is deeply connected to the communities he serves and values building meaningful relationships with each patient. When he's not in the clinic, Matthew enjoys exploring the outdoors through camping, road trips, and international travel.
David A. Nyberg, M.D.
Medical Director
Medical Board of California Certification, DEA, NPI
David A. Nyberg, M.D. brings over 40 years of medical expertise to Ultimate Male, with a distinguished background in diagnostic imaging and precision medicine. As a leading physician, he now focuses on applying advanced diagnostic insights to support men’s health, hormone optimization, and longevity care. His extensive clinical experience and academic contributions—including authoring multiple medical textbooks and 150+ publications—enhance our commitment to delivering evidence-based, high-quality wellness care for every patient.
Helena Xin, RN, C
Lead Aesthetic Nurse
Helena Xin is a master's-prepared registered nurse, graduating from Western University of Health Sciences with a robust foundation in both acute and aesthetic care. With extensive experience in the intensive care unit (ICU), Helena has honed her clinical skills in managing critically ill patients, demonstrating her commitment to precision, empathy, and patient-centered care. In the aesthetic field, Helena has further specialized as a certified aesthetic nurse injector, focusing on regenerative injectables, rejuvenation laser treatments, and bioidentical hormone replacement therapy. Her approach prioritizes individualized, results-oriented care, ensuring that each client feels valued and heard throughout their treatment journey. By actively listening to her clients' needs and concerns, Helena creates tailored treatment plans that enhance their confidence and well-being. With a dedication to exceptional customer service and a passion for advancing patient health, Helena is an invaluable resource in both aesthetic and critical care nursing, continually striving to exceed expectations and provide a positive experience for all her patients.