Meet the Sleep Disorders Doctors

The Sleep Disorders Center’s Medical staff are all AASM (American Academy of Sleep Medicine) Board certified physicians with varied back grounds including  internal medicine, pulmonary and pediatrics, we also collaborate with psychologists, and AASDM dentists. These experienced specialists work closely with the patient and his or her family to design and implement the most comprehensive and effective course of care possible.

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Dennis Nicholson, M.D.

Dr. Nicholson is recognized as an authority on sleep disorders and often speaks on the subject to a variety of radio, television and forum audiences. Dr. Nicholson received a B.A. at the City University of New York-Brooklyn College before earning his M.D. at Case-Western Reserve University in Cleveland, Ohio. He then completed his residency in Internal Medicine and Anesthesiology at the University Hospitals of Cleveland. Additionally, Dr. Nicholson maintains triple board certifications in Internal Medicine, Critical Care and Sleep Medicine. He has held directorial positions with the Surgical Critical Care Unit at the University Hospitals of Cleveland and the Critical Care Units at Pomona Valley Hospital Medical Center in Pomona, California.
Dr. Nicholson's interest in sleep medicine prompted him to assist in the development of the Sleep Disorders Center at Pomona Valley Hospital Medical Center, where he has served as director since its inception in 1987. This center is accredited by the
American Academy
of Sleep Medicine and is the leading center in the Inland Valley region.

  • Specialty:
  • Sleep Medicine
Robert Jones, M.D.

Dr. Jones is a lifelong California resident. After graduating from UC Irvine undergraduate and Medical school, he did his residency in Internal Medicine and Pulmonary fellowship at Long Beach Veterans Medical Center.  He moved to Pomona in 1987 and started practicing Sleep Medicine. In 1995, he became Board Certified in Sleep Medicine after already having been Board Certified in Internal Medicine, Pulmonology and Critical Care.  He now lives in Upland with his wife and 2 daughters. Dr. Jones enjoys collecting Drugstore antiques and woodworking in his spare time.

 

  • Specialty:
  • Internal Medicine, Sleep Medicine
Gurbinder Sadana, M.D.
Dr. Sadana moved to the United States in 1977 after completing medical school in India. He completed his residency in Internal Medicine at the Lutheran Medical Center in Brooklyn, NY. and went on to a Fellowship in Pulmonary Medicine at the Catholic Medical Center of Brooklyn and Queens (Cornell University) in New York, NY. Dr. Sadana has been in private practice in Pomona since 1983.

Dr. Sadana sees patients with a spectrum of pulmonary diseases and conditions. He treats Asthma, chronic obstructive lung disease and Interstitial Lung diseases. He also has a hospital-based Critical Care practice where he takes care of patients in the intensive care unit.

Dr. Sadana is Board Certified in Sleep Medicine, Internal Medicine, Pulmonary Medicine and Critical Care Medicine. He is also a Fellow of the American College of Chest Physicians and a Member of The Society of Critical Care Medicine.

Dr. Sadana is currently the Medical Director of Critical Care Services at Pomona Valley Hospital Medical Center in Pomona, CA and serves on the faculty at The UCLA School of Nursing, Adjunct Faculty at The UCLA School of Medicine and Assistant Clinical Professor at Western University of Health Sciences in Pomona, CA.
  • Specialty:
  • Critical Care Medicine, Internal Medicine, Pulmonary Medicine, Sleep Medicine
Carrie Knoll, M.D.

Dr. Carrie E. Knoll, a Claremont native, attended California State University at Los Angeles as an undergraduate and graduated from The Medical College of Wisconsin in Milwaukee.  She spent her pediatric internship at Kaiser Permanente Medical Center in San Francisco and her residency at Loma Linda University Medical Center after three years in the military as a physician.  She is board certified in sleep medicine and pediatrics and a fellow of the American Academy of Pediatrics.

Dr. Knoll began practicing at Pomona Pediatrics in 1998. She has enjoyed participating in international medical trips such as Operation Smile.
  • Specialty:
  • Pediatrics, Sleep Medicine
Heather L. Davis, M.D.

Heather L. Davis-Kingston, MD is a Pulmonary / Critical Care specialist working with Chaparral Medical Group since 2004.

Dr. Davis-Kingston calls herself a small town girl, originally from a small northern California town in the central valley. She grew up there and then moved to Southern California to attend college at USC where she was a Dean's scholar. She received her BS in Biological Sciences in 1993.

She earned her medical degree at the USC Keck School of Medicine, where she also completed her internship and residency in Internal Medicine, followed by a fellowship in Pulmonary and Critical Care Medicine. She was on the Dean's List from 1994-1998 and was elected to the prestigious Alpha Omega Alpha Honor Society.

Dr. Davis-Kingston is a Diplomat of the American Board of Internal Medicine and is board certified in Sleep Medicine, Pulmonary Medicine, and Critical Care. Her private practice focuses on Sleep Medicine, Pulmonary Diseases and hospital-based critical care. Dr. Davis regularly sees patients with sleep disorders such as Insomnia, narcolepsy and obstructive sleep apnea; and pulmonary diseases including pulmonary hypertension, interstitial lung disease, lung cancer and chronic obstructive pulmonary disease. She is also current chair of internal medicine department and chair of the physician care connect team at Pomona Valley Hospital Medical Center. She is a very active leader among her physician peers and strives to improve patient care and experiences at the hospital.  

Dr. Davis is married. She enjoys to travel and spending time with her husband and sister.

Memberships:

  • American Academy of Sleep Medicine
  • American Medical Association
  • American College of Chest Physicians
  • Society of Critical Care Medicine
  • American Thoracic Society

 

  • Specialty:
  • Critical Care Medicine, Internal Medicine, Pulmonary Medicine, Sleep Medicine
  • Insurance Plans:
  • Accepts most insurance plans
Daniel Skenderian, Ph.D.

Dr. Daniel Skenderian is a licensed clinical psychologist who has been in private practice since 1984. He is on staff at both Pomona Valley Hospital Medical Center and Casa Colina Hospital for Rehabilitative Medicine. An adjunct clinical faculty member at the University of La Verne Psychology Department, he is also visiting professor at the Universidad de Iberoamerica health sciences program in San Jose, Costa Rica. A frequent speaker on mind/body topics, Dr. Skenderian is also an Approved Consultant for the American Society of Clinical Hypnosis. Dr. Skenderian’s national and international presentations have focused on sleep disorders, specifically insomnia and parasomnias, pain, and clinical hypnosis. He is a member of the American Psychological Association, the American Society of Clinical Hypnosis, and is recognized by the National Register of Health Service Providers in Psychology. Finally, Dr. Skenderian served on the California State Dental Board for several years as a consultant to the diversion program.

  • Specialty:
  • Psychology, Sleep Medicine
Nadir Eltahir, M.D.
Nadir Eltahir, MD is a Pulmonary and Critical Care Specialist working with Chaparral Medical Group since 2000. He sees patients with pulmonary conditions and is a sleep medicine consultant. Dr. Eltahir also has a hospital based critical care practice.

Originally from Sudan, Dr. Eltahir attended medical school at University of Khartoum Medical School. After a few years in Sudan, Dr. Eltahir moved to Saudi Arabia where he served as a Registrar for the Department of Internal Medicine at Howtat Sudair Hospital in Riyadh. He then moved to the United Kingdom where he was Honorary Senior House Officer in the Department of Internal Medicine at North Manchester General Hospital. In 1993, he served as a Representative Physician for the Embassy of Saudi Arabia at the Mayo Clinic in Rochester, MN.

Dr. Eltahir completed his internship and residency in Internal Medicine at the Hennepin County Medical Center in Minneapolis, MN and a fellowship in Pulmonary and Critical Care Medicine at USC in Los Angeles.

He is board certified in Sleep Medicine, Internal Medicine, Critical Care Medicine and Pulmonary Medicine. He is also a fellow of the College of Chest Physicians. His memberships include American College of Chest Physicians, American Thoracic Society, European Respiratory Society and American Academy of Sleep Medicine. Dr. Eltahir's special interests are in Interstitial Lung Disease, Chronic Obstructive Pulmonary Disease, Asthma and Sleep Disorders.

Dr. Eltahir is married, with two children. He loves to travel, listen to music and occasionally plays basketball.
  • Specialty:
  • Critical Care Medicine, Internal Medicine, Pulmonary Medicine, Sleep Medicine
Gary Demerjian, D.D.S.
Gary Demerjian, DDS is an expert in his field, Dr. Demerjian has been featured in many local newspapers and interviewed on the radio about the latest developments in dentistry. He also has written articles on dentistry for various publications. Dr. Demerjian is a graduate of the Unversity of the Pacific Dental School, The Las Vegas Institute for Advanced Dental Studies - a renowned center for cosmetic and neuromuscular dentistry - and the Institute for Advanced TMJ Studies.

He is a member of the American Academy of Cosmetic Dentistry, Academy of Laser Dentistry, American Academy of Craniofacial Pain, International College of Craniomandibular Orthopedics, International Association of Orthodontics, and of course the American Dental Association and California Dental Association.
  • Specialty:
  • Dentistry, Sleep Medicine
Rakesh Sinha, M.D.

Dr. Sinha has published many scholarly articles in field of pulmonary diseases and critical care medicine. The topics range from pulmonary physiology (six-minute walk test) and pulmonary pharmacology (inhaler techniques) to epidemiology of asthma. His pulmonary publications include clinical manifestations and management of chronic bacterial pneumonia, sarcoidosis, congenital pulmonary abnormalities and pulmonary aspergillosis. He has written on critical care topics of echocardiography and modes of patient monitoring in the critical care setting, mechanical ventilation and use of total parenteral nutrition. He is also one of the authors of 5-minute critical care consults.

Dr. Sinha underwent rigorous training at a surgical critical care program and is very well versed with management of critical neurosurgical and transplant patients. He is well trained to manage total parenteral nutrition in critical patients. His interests include non-tubercular mycobacteria (MAC), sleep disorders, and pulmonary rehabilitation.

Dr. Sinha is Board Certified in Sleep Medicine, Internal Medicine, Pulmonary Diseases and Critical Care Medicine. He completed his fellowships at Mount Sinai School of Medicine, New York for Critical Care (2008-2009) where he received the "The Fellow of the Year Award" Dr. Sinha also completed his residency in Pulmonary Diseases at The Brooklyn Hospital Center in Brooklyn, New York (2006-2008). Dr. Sinha did residency for Internal Medicine at Wyckoff Heights Medical Center in Brooklyn, New York (2004-2006) and obtained his M.B.B.S. from Maulana Azad Medical College, University of Delhi, Indian and his Medical Degree from Vallabhbhai Patel Chest Institute, University of Delhi, India.

 

  • Specialty:
  • Critical Care Medicine, Internal Medicine, Pulmonary Medicine, Sleep Medicine
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