Learn more about Amanda Yonkers, Orthoptist at Crescendo MD, and discover her dedication to empathetic eye care and advancing the field of orthoptics for children. Amanda Yonkers, CO Amanda's journey in ophthalmology began when she received her first pair of glasses at 26 months, after being diagnosed with accommodative esotropia and amblyopia. Throughout her early years, she navigated the challenges of wearing an eye patch and bifocal glasses. This firsthand experience ignited her passion for the field of eye care and inspired her to study binocular vision and orthoptics. Amanda brings forth over a decade of invaluable expertise garnered from her role as an orthoptist treating complex strabismus and amblyopia cases at multi-specialty eye care centers. More recently, her son was diagnosed with strabismus and amblyopia. Her unique perspective as a former patient and parent enables her to empathize deeply with those under her care, while also providing invaluable support to parents in understanding their child's condition. Amanda completed her Bachelor of Science in biology from UC Irvine, and her orthoptic training at the Ross Eye Institute at SUNY Buffalo. After enduring two snowy winters, she returned to her roots in California, joining the Gavin Herbert Eye Institute as an orthoptist. In 2017, Amanda became an integral part of the Stanford Children’s Hospital, where she contributed by lecturing ophthalmology trainees on binocular vision in addition to her clinical responsibilities within the pediatric ophthalmology department. In 2024, Amanda joined Crescendo MD, a concierge medical practice in Silicon Valley, where she helped establish their pediatric ophthalmology department. Throughout her career, Amanda has been passionate about advancing the field of orthoptics. She is actively involved with the American Association of Certified Orthoptists, currently serving on the Board of Directors as the Director of Continuing Education. Her past roles include Vice-President, and Scientific Program Chair. Additionally, she is a valued board member of the Foundation for Orthoptic Research and Education in the Americas (FOREA) and serves on the editorial board for the Journal of Binocular Vision and Ocular Motility. CONTACT US BACK

Learn more about Lorena Torres, PCA at Crescendo MD, whose decade of patient care expertise ensures compassionate support and seamless navigation for families in healthcare. Lorena Torres, PCA Lorena Torres, a seasoned Patient Care Advocate and Certified Phlebotomist at Crescendo MD , brings over a decade of valuable patient care expertise to her role. Her journey into patient-first care began as a caretaker, where she found a fulfilling balance of compassion and professionalism while assisting patients, their families, and medical teams. In 2013, Lorena completed a Patient Care Navigation Program at San Jose City College, marking the inception of her professional voyage in the medical field. Her subsequent involvement in the non-profit health sector further enriched her patient care skills and professional leadership capabilities. When not working in concierge medicine she enjoys working out and spending time with her family. CONTACT US BACK

Learn more about Salvador Galvan, Certified Ophthalmic Assistant at Crescendo MD, and his role in supporting patient care with a calm, reassuring approach. Salvador Galvan Salvador Galvan is a Certified Ophthalmic Assistant and Optician with 15 years of experience in eye care, including 10 years in pediatric ophthalmology and 5 years in adult retinal ophthalmology. Known for his friendly and reassuring approach, Salvador helps patients feel comfortable while guiding them through diagnostic testing, imaging, and treatment explanations. His ability to connect with both children and adults makes him a trusted presence in diverse clinical settings. In addition to his ophthalmic experience, Salvador earned his Associate of Science degree in Fire Technology in 2009. His background in emergency preparedness has strengthened his calm, steady communication style and his ability to support patients in stressful or unfamiliar situations. Outside of his professional role, Salvador enjoys spending time with his family, playing sports, and staying active through regular workouts. CONTACT US BACK

Learn more about Jen Austin, RN at Crescendo MD, and discover her commitment to delivering top-quality concierge care and innovative patient protocols. Jen Austin, RN Jen Austin is an RN at Crescendo MD . With nearly a decade of experience in concierge nursing, Jen is a valuable member of our team. Jen worked alongside Dr. Alan Greene at Private Medical where she cared for both pediatric and adult patients. As the company grew, Jen took on the lead RN role helping to implement procedures and protocols to ensure her patients were consistently getting top-quality care. When COVID-19 hit in 2020, Jen quickly and effectively developed protocols for the Crescendo office following CDC and county guidelines. Furthermore, when the COVID vaccine became available Jen spearheaded the effort to ensure her patients had immediate access to the vaccine safely leading over 30 vaccine clinics. CONTACT US BACK

Meet the compassionate Care Team at Crescendo MD, providing seamless support to ensure personalized, patient-centered care for every family we serve Our Care Team Your Personalized Care Assistants Our Care Team at Crescendo includes skilled nurses, patient care advocates, and specialists who provide comprehensive support for our patients. With a focus on compassionate, individualized care, they ensure a seamless experience and help foster a strong connection between patients, doctors, and external providers. Jen Austin, RN Jen is an RN at Crescendo MD. With seven years of experience in concierge nursing, Jen is a foundational pillar of our team. Read More Vanessa Serrata, PCA Vanessa, an expert Patient Care Advocate at Crescendo MD and a San Mateo County native, has been an integral part of patient care teams in Silicon Valley since 2017. Read More Amanda Yonkers, CO Amanda brings extensive expertise in pediatric ophthalmology and binocular vision, combining clinical excellence with a compassionate, patient-centered approach. Drawing from both her professional experience and personal connection to vision care, she is dedicated to supporting children and families throughout their eye care journey. Read More Becky Genauer, RN Becky’s mixture of medical knowledge and operational experience makes her a perfect fit for Crescendo MD. Read More Lorena Torres, PCA Lorena, a dedicated Patient Care Advocate and Certified Phlebotomist at Crescendo MD, has worked in healthcare since 2011, consistently embodying a patient-first approach. Read More Idalia Longaria Idalia keeps Crescendo running smoothly with a thoughtful, organized approach and is dedicated to creating a welcoming environment for patients and families. Read More Georgia Johnson, RN Georgia is an experienced concierge RN, with deep experience in the newborn nursery, medical-surgical, oncology, and transitional care units. Read More Zayra Helu, PCA Zayra is a valued Patient Care Advocate and Certified Clinical Medical Assistant at Crescendo MD, serving as a patient care coordinator for Dr. Alan Greene in Silicon Valley since 2016. Read More Salvador Galvan Salvador’s experience in pediatric and adult ophthalmology allows him to connect with patients of all ages, creating a calm and reassuring environment while helping them understand their care. Read More Judith Pineda-Cardenas Judith brings a well-rounded background from her experience at Stanford, supporting both clinical care and administrative workflows. She is known for her adaptability, attention to detail, and being a reliable part of the care team. Read More

Meet the expert doctors at Crescendo MD, specializing in pediatrics, primary care, ophthalmology, and urgent care. Personalized care focused on long-term wellness. Our Doctors Your Personalized Care Providers At Crescendo, our doctors are experts in pediatrics, primary care, ophthalmology, and urgent care, combining cutting-edge medical knowledge with compassionate, personalized care. Each physician is dedicated to preventative health, patient-centered wellness, and building long-term relationships with the families they serve. Alan Greene, MD Senior Partner, Pediatrics Alan Greene, MD, FAAP is passionate about primary care pediatrics and delights in joining families to explore the power of individualized care in childhood to optimize longevity. Read More Alan Gianotti, MD, MS, ABEM Adult Primary Care Dr Gianotti embraces an approach to exceptional care that begins with truly knowing his patients. In a quiet, unhurried setting, he has the time and the commitment to understand their lifestyles, their goals and what really matters to optimize their health. Read More Janesta Noland, MD Senior Partner, Pediatrics Janesta Noland, MD, FAAP, brings deep experience in personalized care of children to the Crescendo team, providing outstanding, personalized care to her patients and their families. Read More Hana Grobel, MD Adult Primary Care Hana Grobel, MD, ABFM is a board-certified family physician with a fellowship in integrative medicine who is dedicated to caring for individuals and whole families at every stage of life. Read More Natalie Pageler, MD Pediatrics Dr. Natalie Pageler is a board-certified pediatrician, intensivist and clinical informaticist, who is a nationally recognized leader in pediatric clinical informatics. Read More Erik Schraga, MD Adult Primary Care Erik Schraga, MD, ABEM has extensive experience in acute care medicine and has developed a highly personalized practice that transcends conventional boundaries. Read More Omondi Nyong'o MD Pediatric Ophthalmology and Adult Strabismus Dr. Nyong’o, MD, FAAO is a leading physician of eye care for children and for adults with strabismus. He is well known for his expertise and his personalized approach to medicine. Read More Jonathan Malka,MD Pediatric Allergy & Immunology Specialist Dr. Malka, MD, FAAP, FAAAAI comes to Crescendo recognized as one of South Florida’s most trusted experts in pediatric food allergies, asthma, eczema, hives, and immunologic conditions. Read More

Experience exceptional concierge primary care services in San Francisco Bay Area. At Crescendo MD, we prioritize your health with personalized medical attention. Elevated Access in the San Francisco Bay Area Personalized Care. Thoughtful Medicine. Elevated Access. CrescendoMD offers concierge medicine for individuals and families in the San Francisco Bay Area , who expect exceptional medical oversight paired with personal attention. Our limited patient panel allows us to practice medicine with depth, precision, and intention. A Philosophy of Care Rooted in Deep Understanding CrescendoMD is founded on the belief that smaller patient panels create space for deeper relationships and better medicine. Our team of physicians each bringing expertise across every stage of life and every level of clinical complexity. What Concierge Medicine Means at CrescendoMD San Francisco Bay Area patients often balance demanding professional, personal, and travel schedules. Our model allows us to understand the full context of each person’s health. Traditional clinics depend on brief visits that may overlook subtle but meaningful changes. Long-term relationships support early recognition of risk, stronger decision making, and more individualized care. A smaller panel also ensures that access is immediate and continuity is uninterrupted. Acute needs, ongoing conditions, preventive planning, and unexpected issues all receive direct physician attention. How Our Approach Differs from Traditional Primary Care in the San Francisco Bay Area Many practices operate within insurance-driven structures that rely on speed and volume. CrescendoMD provides a refined alternative. Time for meaningful care Extended visits support thoughtful discussion, clarity, and planning. Personalized prevention and precision medicine Care is tailored to family history, genetic risk, lifestyle, and long-term goals. Active physician involvement at every stage We remain engaged in diagnostics, follow-up, coordination, and care transitions. Direct communication and immediate access Members reach their physician easily for updates and urgent needs. Whole-family medical expertise We support children, adults, and older adults through one coordinated system. Earlier identification and proactive action Close familiarity with each patient leads to earlier intervention. The Experience of Care San Francisco Bay Area patients value an environment that feels calm, private, and thoughtfully designed. Our clinic supports meaningful communication, warmth, and trust, creating space for the type of relationship-based care that defines our practice. Membership Includes • Extended visits • 24 hour direct physician availability • Comprehensive preventive evaluations • Advanced diagnostics and longevity testing • Navigation of specialty care • Support for in-home services • Care for patients of all ages • Direct communication for updates and urgent concerns Who We Serve Members include leaders in technology, philanthropy, finance, and the arts, along with high-performance individuals and athletes who depend on expertise and discretion. Why San Francisco Bay Area Patients Choose CrescendoMD Patients choose us because they want clarity, continuity, and a team that handles complexity on their behalf. They value communication that is direct and timely, with care that is deeply informed by understanding the full medical picture. CrescendoMD provides care that is calm, precise, and fully centered on the patient.

Meet Dr. Natalie Pageler, a board-certified pediatrician and clinical informaticist, dedicated to innovative, compassionate care for children and families. Natalie Pageler, MD Pediatrics Dr. Natalie Pageler is a board-certified pediatrician, intensivist and clinical informaticist, who is a nationally recognized leader in pediatric clinical informatics. She has cared for children and families for over 20 years, combining compassionate bedside care with innovative approaches to improving the patient and family experience and outcomes. Dr. Pageler completed her undergraduate degree in Engineering Physics at the University of Arizona, before going on to Stanford for medical school, pediatric residency, and pediatric critical care fellowship. She also completed a masters in medical education through the University of Cincinnati, where her thesis on the use of computerized clinical decision support to inform best practices for clinicians. After completing her training, Dr. Pageler served on faculty in the pediatric intensive care unit at Stanford Children's Health, which gave her not only advanced expertise in managing complex medical issues, but also the ability to calmly and adeptly navigate emergencies, as well as a deep respect for the resilience of patients and families. Dr. Pageler also served as Chief Health Informatics Officer at Stanford Children's for a decade, where she led digital transformation efforts to advance compassionate, patient-centered care enabled by cutting-edge technology. She co-founded the Stanford Clinical Informatics Fellowship, the first of its kind in the nation, to train the next generation of healthcare leaders in the applications of advanced technology to improve the quality of healthcare. In addition to her clinical practice at Crescendo MD, Dr. Pageler continues to serve as Associate Dean and Division Chief of Clinical Informatics at Stanford, where she leads efforts to harness technology and data to improve children’s health. She continues to drive advances in patient engagement, digital health, and artificial intelligence in pediatrics and to train and mentor the next generation of physician leaders. Dr. Pageler is especially passionate about partnering with families to support children and teens as they grow — from routine health and wellness, to sports medicine, to the complex developmental and emotional needs of adolescents. Her practice reflects her belief that the best care comes from a trusted, ongoing relationship that provides personalized attention and innovative, data-driven, proactive care to help children grow into healthy, thriving adults. Outside of medicine, Dr. Pageler enjoys cycling, gardening, fine wines, and traveling with her husband and three sons. CONTACT US BACK

Discover Dr. Hana Grobel, a family physician and integrative medicine specialist offering personalized, compassionate primary care for individuals and families. Dr. Hana Grobel, MD Adult Primary Care Dr. Hana Grobel, MD, ABFM is a board-certified family physician with a fellowship in integrative medicine who is dedicated to caring for individuals and whole families at every stage of life. She values long-term relationships with her patients and practices a comprehensive, patient-centered approach that emphasizes prevention, lifestyle, and overall well-being. Dr. Grobel earned her undergraduate degree in psychology from Amherst College, developing a strong interest in the mind-body connection. After graduation, she was awarded the Amherst-Doshisha Fellowship and spent a year teaching in Japan as the cross-cultural ambassador. She then earned her medical degree from Mount Sinai School of Medicine, where she was selected for the Gold Humanism Honor Society in recognition of her compassionate approach to care. She completed her residency and fellowship in Family and Integrative Medicine at the UCSF Santa Rosa Residency Program. Over the past decade, Dr. Grobel has cared for patients at the Hayward Community Wellness Center and the Sutter Palo Alto Medical Foundation. She enjoys getting to know her patients, listening to their stories and understanding their values, experiences, and goals. She combines evidence-based medicine with personalized care, working collaboratively to support each patient’s path to better health. Throughout her training and career, Dr. Grobel has sought out innovative ways to educate and inspire both patients and colleagues in the pursuit of health and healing. From leading group medical visits to teaching medical professionals about different therapeutic approaches, Dr. Grobel recognizes the power of community and the value of collaborative care. When her young son was diagnosed with cancer, Dr. Grobel experienced firsthand what it means to be a patient and a caregiver within the healthcare system. This personal journey deepened her empathy, strengthened her commitment to advocacy, and reaffirmed her purpose as a physician. Outside of work, she enjoys spending time outdoors with her husband and two children, visiting local farmers’ markets, learning about different cultures and languages, and trying new recipes. CONTACT US BACK

Learn more about Zayra Helu, PCA at Crescendo MD, and discover her commitment to patient care and fostering strong relationships within the Crescendo community. Zayra Helu, PCA Zayra Helu is a highly esteemed Patient Care Advocate and Certified Clinical Medical Assistant at Crescendo MD . When our nursing team requires additional support, Zayra seamlessly deploys her clinical expertise to ensure our patients receive the reliable care they deserve. Her unwavering dedication to the Crescendo MD community is evident in the strong relationships she has cultivated with Dr. Greene’s patients since 2016. Her commitment extends to nurturing connections with all our Crescendo families. Outside her role in pediatric concierge medicine, Zayra, her husband, and their two children, cherish moments spent with their extended families, fostering a profound sense of togetherness in their personal lives. CONTACT US BACK

Learn more about Becky Genauer, RN at Crescendo MD, and discover her commitment to patient care through her extensive experience in orthopedics and pediatrics. Becky Genauer, RN As a nurse at Crescendo MD , Becky plays an integral role in providing support in all aspects of our patient care. Prior to joining Crescendo MD, Becky worked as a Nurse Practitioner in Orthopaedic Surgery in New York City for 8 years and in Pediatrics as an RN for 2 years. After moving to the Bay area in 2015 Becky was Operations Lead at Palo Alto Menlo Park Parent Club, Director of Scheduling for Alpine Strikers Soccer Club, and Director of Operations at Global Impact Advisors, LLC before getting her California nursing license and returning to full-time nursing care. Becky’s mixture of medical knowledge and operational experience has been a perfect fit for Crescendo MD. CONTACT US BACK

Experience exceptional concierge primary care services in Portola Valley. At Crescendo MD, we prioritize your health with personalized medical attention. CONCIERGE PRIMARY CARE Elevated Primary Care for Adults Who Value Precision, Access, and Continuity Crescendo MD offers adult primary care designed for individuals and families who expect a more attentive, clinically sophisticated approach to health. We care for patients across Portola Valley, Woodside, Atherton, Palo Alto, Los Altos Hills, throughout California, and internationally. Your physician remains engaged, informed, and accessible—wherever life takes you. Our care model emphasizes discretion, clarity, and consistent medical thinking. Patients receive private visits, 24/7 access for urgent concerns, and comprehensive health planning tailored to individual goals. INQUIRE Your Primary Care Team Meet the physicians leading our Primary Care clinic, delivering personalized, compassionate care with tailored solutions that grow with you. Alan Gianotti, MD Adult Primary Care Dr. Gianotti, MD, ABEM approaches every patient as a unique individual and focuses on helping each of them reach their health and wellness goals. He is ideally suited to care for both urgent and long-term health issues. Read More Erik Schraga, MD Adult Primary Care Erik Schraga, MD, ABEM has extensive experience in acute care medicine and has developed a highly personalized practice that transcends conventional boundaries. Read More Hana Grobel, MD Adult Primary Care Hana Grobel, MD, ABFM is a board-certified family physician with a fellowship in integrative medicine who is dedicated to caring for individuals and whole families at every stage of life. Read More Concierge Primary Care at Crescendo is available by referral only. We are not contracted with any insurance company. Learn more about us . What You Can Expect Concierge Adult Medicine Without Compromise Direct access to your physician via phone, text, or email Same-day or next-day appointments Extended, unhurried visits in office or at home Care coordination with top subspecialists regionally and nationally Thoughtful, individualized medical guidance rooted in long-term relationships Preventive & Longevity-Focused Care Core Services Comprehensive risk profiling and annual health reviews Personalized health optimization plans Year-over-year tracking of key metrics and goals Cardiovascular & Metabolic Health Advanced lipid analysis, calcium score interpretation, and prevention strategies Glucose monitoring, body composition analysis, and nutrition planning Executive Health & Performance Medicine Structured annual evaluations with lab, imaging, and functional assessments Fitness, mobility, and exercise physiology evaluations Sleep and circadian rhythm optimization Urgent & Acute Care Support Immediate access for acute illness, injuries, or new symptoms Physician-guided navigation of emergency events Support after-hours and during travel Chronic Condition Management Personalized care for hypertension, diabetes, autoimmune disease, and more Mental health support integrated with lifestyle and medical care Medication review with a focus on safety and long-term impact Diagnostics & Advanced Testing Coordination of labs, imaging, and specialty diagnostics Genetic and epigenetic testing when appropriate Integration with continuous glucose monitors and wearable devices In-Home & On-Site Medical Visits Available locally and during travel Designed for privacy, continuity, and convenience Travel Medicine & Remote Support Pre-travel planning and immunizations Real-time support during domestic or international travel Specialist Coordination & Navigation Access to leading experts across Stanford, UCSF, Mayo Clinic, and more Expedited referrals and follow-up coordination Designed for Patients with Complex Lives Whether you’re managing multiple homes, frequent travel, or demanding professional responsibilities, we maintain seamless continuity across geography and time zones. Individualized care plans Proactive monitoring and check-ins Rapid physician access, even when abroad A Practice Built on Privacy, Precision, and Relationship No waiting rooms Direct communication with your physician A calm, intelligent practice culture grounded in clinical excellence We serve individuals who could receive care anywhere—and who choose a model defined by discretion, clarity, and proactive support.