Who We Are – Health Center
The Edward R. Roybal Comprehensive Health Center is part of the Department of Health Service Ambulatory Care Network. It’s one of the facilities of the East Los Angeles Health Center Group. Our clinic provides access to medical services to adult and pediatric patients in the East Los Angeles community with the commitment to excellence and to improve the health of those we serve. Services are delivered in a safe, patient-centered environment that is accessible to the entire community.
Director
Sameer Nangia, MPT, MBA
Sameer Nangia serves as the Director of the East Los Angeles Health Center group, where he is dedicated to improving the delivery of healthcare services to the community. Mr. Nangia joined the Department of Health Services (DHS) in 2024 and brings with him extensive experience in healthcare leadership, particularly in post-acute care.
Before joining DHS, Mr. Nangia held key leadership positions in post-acute care, where he successfully led teams and implemented initiatives that enhanced patient outcomes and operational efficiency. His passion for improving healthcare access and quality continues to guide his work in East Los Angeles, ensuring that the center provides comprehensive, compassionate, and patient-centered care to the local community.
Mr. Nangia holds both undergraduate and graduate degrees from the University of Michigan and Wayne State University in Physical Therapy and Business Administration, respectively. His unique blend of clinical and business expertise enables him to effectively navigate the complexities of healthcare management and drive positive change.
Committed to continuous improvement, Sameer remains a strong advocate for the integration of innovative practices and compassionate care in all aspects of the health center’s operations.
Medical Director
Dr. Gregory M. Roybal, M.D., M.P.H.
Dr. Gregory M. Roybal, M.D. is the Medical Director of the East Los Angeles Health Center Group. Dr. Roybal has focused his efforts in health care delivery as it pertains to patients with chronic illness. As the Co-Chair of the Los Angeles County Department of Health Service’s Disease Management Oversight Team, he has been actively involved in the planning, implementation, and support of the chronic disease management program for Health Services and is committed to maintaining and growing this delivery model as a key component of a model for the delivery of care to the patients with chronic illness.
Nursing Director
Faye Christen
A transformational healthcare leader with over 15 years of leadership experience, Faye Christen is the Clinical Nursing Director for San Gabriel Valley Health Center Group and East Los Angeles Health Center Group. She brings to the ACN a proven track record in driving enterprise-wide quality improvement, digital innovation, and workforce transformation across integrated health systems.
Faye Christen holds a Doctorate in Nursing from Yale University and offers deep expertise in healthcare policy, strategic leadership, and cross-functional collaboration. She is passionate about fostering healthy work environments and remains committed to leveraging technology—including virtual care models, workflow automation, and data-driven strategies—to drive clinical excellence and operational efficiency.