Dr. Hyun Don Yun is a board-certified internist, hematologist and medical oncologist with extensive clinical, academic, and research experience. He currently serves as an Assistant Clinical Professor in the Division of Hematology and Oncology at the University of California, Irvine, a role he has held since April 2023. Prior to this, he practiced at Compassionate Cancer Care Medical Group in Riverside, CA (2021–2022), and served as an Assistant Professor in the Division of Hematology, Oncology, and Stem Cell Transplantation at...

Dr. Ishan Asokan is a dual-trained internal medicine physician and hospitalist with extensive experience across academic and community healthcare systems. He currently serves as an inpatient hospitalist at Kaiser Permanente West Los Angeles, Providence Saint Joseph Medical Center, and UCLA Health, where he also holds an appointment as Associate Physician Diplomat. In April 2025, he founded Asokan Healthcare Services, Professional Corporation, expanding his clinical and consulting practice. From 2023 to 2024, Dr. Asokan was an Assistant Clinical Professor of Medicine...

Jacob M. Tsadok, M.D., Q.M.E., has been a board certified in internal medicine since 1996. He completed his internal medicine training while attending the Technion-Israel Medical Faculty in 1992 before continuing his residency program at Washington University in 1995. Dr. Tsadok belongs to the American College of Physicians.

Dr. Jeffrey Crudo is an experienced hospitalist and clinic internist with over 20 years of diverse healthcare experience. He is recognized for leadership, flexibility, and professionalism developed through long-term work across hospitalist, clinic, and locum tenens settings. Dr. Crudo is highly collaborative and patient-oriented, with a practice style grounded in continuity of care, clear communication, and dependable clinical coverage across a wide range of inpatient and outpatient environments. Since April 2025, Dr. Crudo has served as an MDSI Internal Medicine...

Dr. Jonathan Lyu is a board-certified geriatrician and internist with extensive clinical, academic, and research experience. He earned his Doctor of Osteopathic Medicine from Midwestern University, Arizona College of Osteopathic Medicine in 2020, and a Bachelor of Science in Biology (Cum Laude) from the University of California, Riverside in 2014. He completed his Internal Medicine Residency at Olive View – UCLA Medical Center (2020–2023) and a Geriatric Medicine Fellowship at Ronald Reagan – UCLA Medical Center (2023–2024). Dr. Lyu’s clinical...

Dr. Kathleen Colleran is a board-certified endocrinologist and internal medicine physician with over 25 years of experience in clinical care, research, and medical education. She is licensed in New Mexico (License #95-210, valid through 2026) and holds recertifications in Internal Medicine and Endocrinology, Diabetes, and Metabolism. She is also WPATH GEI certified for advanced gender-confirming hormone therapy and adolescent transgender care. Dr. Colleran earned her Bachelor of Science in Molecular Biology from the University of Wisconsin-Madison in 1986 and her...

Dr. Kevin Kwak is a board-certified physician in Internal Medicine and Preventive Medicine with a subspecialty in Clinical Informatics. He holds active licensure with the Medical Board of California and is DEA certified. He currently serves as Vice President of Clinical Architecture at Point and Click Solutions, a leading Electronic Health Record (EHR) provider for college health systems, where he oversees strategic planning, the design of intuitive user interfaces, and ensures ONC-ATCB and CCHIT certification compliance. His work supports major...

Dr. Kristin M. Lane is an internal medicine physician with long-standing experience in academic,  hospital, outpatient and rehabilitation medicine. She is a Diplomate of the American Board of Internal Medicine and of the American Board of Obesity Medicine. She has rural outpatient medicine, concussion and clinic experience.  She currently practices as a hospitalist managing complex medical conditions and coordinating multidisciplinary treatment plans for patients in both the hospitalized and rehabilitation settings. Dr. Lane completed her Internal Medicine Residency at Banner...

Dr. Kumar Gandhi is a dedicated primary care and internal medicine physician with extensive experience providing comprehensive care to diverse patient populations. Board-certified in Internal Medicine, Dr. Gandhi has expertise in managing acute and chronic conditions, preventive health, complex medication management, and care coordination across multidisciplinary teams. He is recognized for his strong clinical judgment, patient-centered approach, and commitment to evidence-based decision-making. Dr. Gandhi’s clinical experience spans federally qualified health centers, urgent care, occupational medicine, mobile wound care, and telemedicine,...

Dr. Maria Persianinova is a board-certified internal medicine physician with over a decade of experience in acute inpatient care, complex case management, and medical documentation. Her clinical career includes a long-standing tenure at Kaiser Permanente South Sacramento, where she served as a full-time hospitalist and nocturnist from 2016 to 2024, and currently continues in a per diem capacity. Known for her leadership and collaborative approach, Dr. Persianinova played a key role as Emergency Department liaison and co-founded the Hospital Medicine...