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Dr. Yelyzaveta Prysyazhnyuk is a compassionate and highly trained physician with a strong commitment to advancing mental health care. She brings a rich background in internal medicine and a deep interest in the intersection of physical and mental well-being to her role at Vital Psych MD LLC. Dr. Prysyazhnyuk completed her undergraduate studies at Barnard College of Columbia University before earning her medical degree from SUNY Downstate College of Medicine. She went on to complete her residency in Internal Medicine at the Zucker School of Medicine at Hofstra/Northwell NS/LIJ, where she also obtained certifications as a clinician educator and in lifestyle medicine. At Vital Psych MD, Dr. Prysyazhnyuk is excited to focus her practice on supporting individuals through evidence-based care that bridges the gap between physical and mental health. Her clinical experience and academic foundation have shaped her integrative approach, helping achieving overall well-being and a lasting change.

Dr. Michael Chan, MD, MS, RST is the physician founder of CaptainMD.com, and has practiced medicine since completing medical school at the top 5% in 2012. He practices telemedicine across California, Florida, Indiana, Michigan, Nevada, New York, North Carolina, South Carolina, Utah, and Washington and Concierge medicine to select clients in Silicon Valley, Southern California, Las Vegas, Miami and New York. He takes great care to provide patients with an accurate diagnosis, and precise, rooted treatment. Dr. Chan is equipped to handle nearly all of your healthcare needs so you don't need to see multiple physicians. As a patient of his, you can communicate with him 24/7. Education: UC Berkeley, Masters and MD (Chicago Medical School), Internal Medicine Residency (Yale School of Medicine), Sleep Medicine (Duke University School of Medicine). Board Certified by American Board of Internal Medicine

Dr. Keyvan Shirazi, MD, is a highly experienced physician who has been providing comprehensive primary care and internal medicine services to patients throughout Southern California for more than 24 years. With a special focus on preventive medicine, chronic disease management, geriatrics, and complex medical care, Dr. Shirazi is dedicated to helping patients achieve optimal health and maintain their quality of life at every stage of adulthood.

After completing his medical training at the Medical College of Pennsylvania and Hahnemann University Hospital in Philadelphia, Dr. Shirazi returned to his hometown in Southern California to begin his medical career. Since 2002, he has been an integral part of the San Fernando Valley medical community, caring for generations of patients and their families.

Dr. Shirazi maintains hospital privileges at Providence Cedars-Sinai Tarzana Medical Center, where he serves as Medical Director and plays an active leadership role in quality improvement initiatives, utilization review, and patient care management. As a Physician Advisor, he works closely with case management teams to enhance patient outcomes and ensure the highest standards of care.

Recognizing the growing healthcare needs of seniors and medically complex patients, Dr. Shirazi has devoted much of his career to the care of frail and elderly individuals. He serves as Medical Director at Los Angeles Jewish Health, where he has provided compassionate care for more than two decades. He also holds privileges at the Joyce Eisenberg Keefer Medical Center and works closely with skilled nursing facilities throughout the region.

A Certified Medical Director, Dr. Shirazi has extensive experience in geriatric medicine, chronic disease management, post-acute care, and end-of-life care. His unique ability to coordinate care across the office, hospital, rehabilitation, and skilled nursing settings allows his patients to benefit from continuity of care that is increasingly rare in modern medicine.

Patients appreciate Dr. Shirazi's personalized approach, accessibility, and commitment to treating every individual with dignity, respect, and compassion. He believes exceptional healthcare begins with listening and takes pride in developing long-term relationships with patients and their families. Whether caring for young adults, working professionals, seniors, or multiple generations within the same family, Dr. Shirazi strives to provide the same level of care he would want for his own loved ones.

In addition to his clinical and leadership responsibilities, Dr. Shirazi enjoys mentoring healthcare professionals and collaborating with colleagues to advance quality patient care. Outside of medicine, he enjoys spending time with his wife and three children, traveling, exercising, and following his favorite sports teams.

Erica Chen, MD, is a board-certified allergy and immunology specialist practicing at the Allergy and Asthma Specialist Doctors, Inc. location in West Covina, California. Her practice is centered around the treatment of allergic diseases, including nasal allergies and asthma.

Dr. Chen earned her medical degree from the Keck School of Medicine at the University of Southern California. Subsequently, she completed her combined internal medicine pediatric residency and allergy and immunology fellowship training at the Los Angeles County Hospital at the University of Southern California.

Dr. Chen is board certified by the American Board of Allergy and Immunology. She has contributed to multiple peer-reviewed scientific presentations and publications. She also holds numerous professional society memberships, including the American Academy of Allergy Asthma and Immunology and the American College of Allergy, Asthma and Immunology.

Dr. Chen is currently accepting new patients and looks forward to welcoming them to Allergy and Asthma Specialist Doctors, Inc.

Ashkan Lashkari, MD, is a physician at Wellness Oncology and Hematology. Dr. Lashkari offers personalized oncology and hematology care to patients at the practice’s offices in West Hills and Tarzana, California.

Born and raised in Santa Monica, California, by parents who were both dedicated educators, Dr. Lashkari knew at a young age that he wanted a career that would allow him to help others. He stayed close to home for his education, earning bachelor’s degrees in art history and molecular biology from the University of California at Los Angeles, and then remained at UCLA to complete his Doctor of Medicine degree.

During medical school, Dr. Lashkari developed a keen interest in cancer care, inspired by the discoveries of new treatments and the possibility of helping people with challenging conditions.

After an internal medicine residency at UCLA, Dr. Lashkari completed a fellowship in hematology and medical oncology at the City of Hope Comprehensive Cancer Center in Duarte, California. He focused his time on learning how to design clinical trials and researching familial cancer syndromes. His vast experience allows him to provide high-quality, compassionate care to his patients.

Dr. Lashkari is certified by the American Board of Internal Medicine, the American Board of Medical Oncology, and the American Board of Hematology. Because of his ongoing dedication to knowing about the latest oncology treatments and advances, he retains active membership in the Medical Oncology Association of Southern California, the American Society of Hematology, and the American Society of Clinical Oncology. He is also an assistant clinical faculty member at Olive View–UCLA Medical Center in Sylmar, California.

Dr. Lashkari enjoying spending time with his wife and two daughters, traveling, running, visiting museums, playing tennis, and cooking. He speaks English and Farsi.

Omid S. Shaye, MD, is an oncologist and hematologist at Wellness Oncology and Hematology. Dr. Shaye treats patients at the practice’s medical offices in West Hills and Tarzana, California.

Dr. Shaye is a native of the San Fernando Valley. He earned his undergraduate degree from the University of Southern California in Los Angeles, then remained at USC to complete his Doctor of Medicine.

During his residency and fellowship in hematology and oncology at the USC Norris Cancer Center, Dr. Shaye was chosen as chief fellow of medical oncology. He then established Wellness Oncology and Hematology in order to share the newest, most cutting-edge therapeutic options with cancer and hematology patients in the San Fernando Valley.

Dr. Shaye sees his role as the “quarterback of a patient’s care,” offering individualized treatments that can include options like targeted therapies, clinical trials, immunotherapies, chemotherapy, radiation, and surgery. He spends time getting to know his patients and their families as he helps them along the road to wellness.

Dr. Shaye is certified by the American Board of Internal Medicine and the American Board of Medical Oncology. He is a member of the Medical Oncology Association of Southern California, the Community Oncology Alliance, and the American Society of Clinical Oncology. He speaks English, Spanish, and Farsi.

Christopher Ho, MD, is a physician at Wellness Oncology and Hematology. Dr. Ho treats cancer and hematology patients in West Hills and Tarzana, California, as part of the Wellness Oncology and Hematology medical team.

Dr. Ho was born and raised in Philadelphia. He earned his undergraduate degree from Johns Hopkins University in Baltimore, where he lettered in lacrosse, then returned to Philadelphia to earn his Doctor of Medicine from Temple University. While in medical school, he clerked at the Fox Chase Cancer Center in Philadelphia, an experience that ignited his interest in medical oncology research.

After a residency in internal medicine at the University of California, Davis, Dr. Ho received subspecialty training in medical oncology and hematology at the University of Southern California’s Keck School of Medicine in Los Angeles. He served as chief fellow of medical oncology.

Dr. Ho is certified by the American Board of Internal Medicine, the American Board of Medical Oncology, and the American Board of Hematology. To keep up with the latest advancements in his specialties, he retains active membership in the Medical Oncology Association of Southern California, the American Society of Hematology, and the American Society of Clinical Oncology.

Dr. Ho has dedicated himself to the belief that the health of every one of his patients depends on a comprehensive, personalized approach to care that includes a combination of the latest treatment techniques and the personal touch of a physician who truly cares.

Because of his wide range of interests, including music, nutrition, calisthenics, Philadelphia Eagles football, and gourmet food, Dr. Ho is able to connect easily with his patients and share insightful conversations. He is a devoted family man, spending as much time as possible with his wife and two young sons. He speaks English, Spanish, and Chinese.

Dr. Hilda Riderer was born and raised in Romania and moved to California with her family when she was a young girl at 9 years old.

She always had a passion for medicine so she pursued an education in the medical field going to osteopathic medical school in Denver, Colorado and completing her Internal Medicine residency in Long Beach, California. Her love of medicine developed into a love for aesthetics but also for preventive medicine and she began exploring options in more natural ways to heal the body and make her patients feel healthy and also beautiful from the inside and out.

To date, she’s still very excited to continue the pursuit of preventive medicine offering services such as IV and vitamin infusions but with a touch of aesthetics to help her patients look and feel their best.