Our Physicians

We work with leading physicians in the growing field of sleep medicine. As a network of independent diagnostic testing facilities (IDTF) we are independent of a physician office, hospital or healthcare system. Our purpose is to furnish diagnostic tests and not directly use test results to treat patients. This means that we work closely with referring physicians and have relationships with interpreting physicians across California.

Once the sleep study is completed and the data is scored, the report is sent to one of our independent sleep specialists for review and interpretation. A referring physician may select a specific physician to interpret her patient’s sleep study or may defer to one of our qualified, sleep-boarded physicians.

If you do not have a physician to refer you for a sleep study or would like a consultation with a sleep specialist, we can refer you to one of our physicians.

  • Deepti Chandran, M.D.

    Dr. Chandran received her medical degree from Wright State University in Dayton, Ohio. She completed her Internal Medicine residency at UCSF-Alameda County Medical Center. After this, she completed a fellowship in Sleep Medicine at Stanford Sleep Disorders Clinic, one of the most prestigious sleep programs in the country.  In addition to her board certification in …

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  • Karen D. Cheng, M.D, Laguna Hills

    Specialties

    • Neurology
    • Sleep Disorders

    Dr. Karen Cheng is board–certified in sleep medicine and neurology. She is an active member of the American Academy of Sleep Medicine, the American Academy of Neurology and the California Sleep Society. Dr.  Cheng is in private practice in Laguna Hills at the Saddleback Medical Tower and is a medical staff member of Saddleback Memorial Medical …

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  • Yurzul Dhanani, M.D., Hemet

    Specialties

    • Sleep Disorders
    • Pulmonary and Intensive Care

    Dr. Yurzul Dhanani is Board Certified in Internal Medicine, Pulmonary (Respiratory) Medicine and Critical Care Medicine. Dr. Dhanani specializes in the diagnosis and treatment of sleep disorders, in particular sleep apnea, and lung diseases. Dr Dhanani did his Internal Medicine Residency at Helene Fuld Medical Center in Trenton N.J. and completed his Chief Residency at …

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  • Aimee French, M.D., Riverside & Corona

    Dr. Aimee French, a graduate of UCLA Medical School, is a board certified physician who opened her medical practice in Riverside and Corona in 2013. She is the local Inland Empire Chairman for the American Lung Association and has helped in the planning committees for the Annual Lung Walk held each November. She has aided …

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  • Babak Hakimisefat, D.O., Burbank

    Specialties

    • Critical Care
    • Sleep Medicine
    • Pulmonology

    Dr. Hakimisefat attended the University of California Berkeley and completed medical school at Tuoro University College of Osteopathic Medicine in Mare Island, California. He completed his residency and fellowship in pulmonary and critical care medicine in New York at Long Island Jewish Medical Center. Dr. Hakimisefat complete his sleep medicine fellowship in adult and pediatric …

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  • Shirisha Janumpally, M.D.

    Specialties

    • Neurology
    • Sleep Disorders

    Dr. Shirisha Janumpally is a board-certified neurologist and sleep specialist. She is also a member of the American Academy of Sleep Medicine, American Academy of Neurology and American Medical Association. She has worked in both academic and community settings as a neurologist and sleep medicine specialist. Dr. Janumpally grew up in southern California. She went …

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  • Young Ko, M.D., Lancaster

    Dr. Young Ko has been in private practice for over 30 years and is boarded in critical care, pulmonology and sleep medicine. He has served the communities of the Antelope Valley with up-to-date pulmonary knowledge and new procedures including a treatment for patients with severe persistent asthma called Bronchial Thermoplasty. Dr. Ko performs Endobronchial Ultrasound …

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  • Beth Lo, M.D., Newport Beach

    Specialties

    • Sleep Medicine
    • Neurology

    Dr. Beth Lo is a board-certified neurologist and sleep specialist. She completed her neurology training and sub-specialty training in sleep medicine at University of California, Irvine. She is originally from the Boston area and went to medical school at Tufts University. She is in private practice, seeing patients with sleep disorders and neurological diseases in …

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  • Sheila Manhas, M.D.

    Specialties

    • Sleep Medicine
    • Neurology

    Dr. Sheila Manhas received her medical degree from the Univeristy of Alberta, Edmonton, Alberta and completed her residency in neurology at the University of Manitoba, Winnepeg, Manitoba. Dr. Manhas was a Fellow of the Royal College of Physicians and Surgeons of Candata.  She is board certified in neurology and sleep medicine. …

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  • Ramin Mehdian, M.D., Thousand Oaks

    Specialties

    • Pulmonology
    • Critical Care
    • Sleep Medicine

    Dr. Mehdian is a board certified pulmonologist, a member of the American Academy of Sleep Medicine and a fellow of the American College of Chest Physicians. Dr. Mehdian has had an active practice in Thousand Oaks/Newbury Park since 2002 where he sees and manages pulmonary and sleep medicine patients at his office. Dr. Mehdian has …

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  • Stuart Menn, M.D., Palm Springs & Rancho Mirage

    Specialties

    • Sleep Medicine
    • Pulmonology
    • Internal Medicine

    Dr. Stuart Menn has gained a reputation in sleep disorders medicine for his dedicated and conscientious work, both as a clinician and as a researcher. As a Board Certified Sleep Specialist, Dr. Menn’s expertise spans a wide range of sleep disorders. As a Board Certified Internist and Boarded Pulmonologist, Stuart Menn focuses on how sleep …

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  • Said Mostafavi, M.D., Los Angeles

    Specialties

    • Sleep Disorders
    • Pulmonary and Intensive Care

    Dr. Mostafavi has been a leader in the forefront of the field of sleep medicine for over two decades. He holds multiple board certifications including sleep medicine by two different certifying bodies, American Board of Sleep Medicine (ABSM) and American Board of Internal Medicine(ABIM), and a subspecialty in sleep medicine.  Dr. Mostafavi is also boarded …

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  • Kaveh Rezvan, M.D., Riverside & Corona

    Specialties

    • Sleep Medicine (adult and pediatric)
    • Pulmonary and Critical Care

    Dr. Kaveh Rezvan, is formally trained at University of Southern California, where he received the “Om Sharma” Award for Clinical Excellence in 2014.  In addition to his extensive training in Pulmonary and Critical Care, he completed a fellowship in Sleep Medicine. In October 2015, he became a quadruple boarded physician. Dr. Rezvan’s innovative training is …

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