Dr. Nathaniel Watson
Dr. Fred Richardson

KEYNOTE Dr. Nathaniel Watson

Nathaniel F. Watson, MD, MS, is the immediate past president of the American Academy of Sleep Medicine (AASM) and is board-certified in sleep medicine and neurology.
He is a professor of neurology at the University of Washington in Seattle, co-director of the University of Washington Medicine Sleep Center and director of the Harborview Medical Center Sleep Clinic.
Dr. Watson completed his fellowship and residency in neurology – and earned a master’s degree in genetic epidemiology – at the University of Washington. He earned his medical degree from the University of North Carolina School of Medicine in Chapel Hill, N.C.

Dr. Watson is adept at diagnosing and treating clinical sleep disorders of all types, including sleep-disordered breathing, insomnia, narcolepsy and other hypersomnias, restless legs syndrome/periodic limb movement disorder and circadian rhythm disorders. He uses polysomnography, multiple sleep latency testing, maintenance-of-wakefulness testing and actigraphy in the diagnosis and management of these disorders.

Dr. Watson is currently researching the genetic aspects of habitual sleep duration, sleepiness and circadian rhythms in conjunction with the UW Twin Registry. As part of this work, he is also investigating the impact of habitual sleep curtailment on the transcriptome. He is interested in the interplay between neurological disorders and sleep and has investigated sleep disorders and sleep quality in patients with traumatic brain injury and Arnold-Chiari-1 malformations. More recently, he is investigating the relationship between sleep disorders and cancer risk and outcomes.

KEYNOTE Dr. Fred Richardson

Dr. Richardson is Associate Attending Physician and Associate Professor of Family Medicine at Rosalind Franklin University of Medicine and Science, Rush University Medical Center in Chicago, Illinois and University of Illinois Medical Center, UIC College of Medicine. A Fellow of the American Academy of Family Physicians, Dr. Richardson is Founder and Medical Director of Dr. Richardson’s Neighborhood Family Practice in Oak Park, Illinois for the past... 25 years. He is on the active admitting medical staffs of University of Illinois Medical Center and Rush-University Medical Center in Chicago for the past 25 years.

Dr. Richardson has taught on the national level co-lecturing with the former U.S. Surgeon General, Dr. David Satcher, on disparities in healthcare. Dr. Richardson has served as principal investigator on grants supported by Robert Wood Johnson Foundation and the Department of Health and Human Services. He has served as a guest surveyor for the Liason Committee on Medical Education. Dr. Richardson was featured in the American Academy of Family Physicians videotape "Family Practice...A Specialty for Our Time" designed for use in the American Academy of Family Physician's 50th Anniversary observance and also in the Public Broadcasting System special "The Family Doctor...At the Heart of Medicine" , one of four family physicians highlighted nationally.

Dr. Richardson was featured in the Chicago Tribune and nationally on the Today Show with Bob Dotson in 2014-2015 for his work treating the underserved elderly in Chicago's toughest neighborhoods with home visits and educating future generations of underrepresented minority medical students for the past 25 years. He was recently featured on the Steve Harvey Show where he was honored as a Harvey's Hero for his work in the community and with minority medical education. He was a guest speaker for We Day Illinois 2015 giving a motivational speech to over 20,000 youth at the Allstate Arena on April 30, 2015.


Jeffrey Boyle, MD

Dr. Boyle is the newest member of the Avera Neuroscience team. Dr. Boyle is from Dakota Dunes, SD. After attending medical school at The University of Nebraska Medical Center in Omaha, NE., he completed his neurology residency at the University of Iowa Hospitals and Clinics in Iowa City, IA. He also spent one year of additional subspecialty training in Sleep Medicine. Dr. Boyle is board certified and joined Neurology Associates in 2014.


Rizan Hajal, MD, FCCP

Rizan Hajal is American Board Certified in Internal Medicine, Pulmonary Medicine, Sleep Medicine and Critical Care Medicine. He received his medical degree from Saint-Joseph University School of Medicine in Beirut, Lebanon. He completed his internship at the University of New York Stoney Brooke. He completed a fellowship in Pulmonary, Critical Care, and Sleep Medicine at Columbia University St. Luke's Roosevelt Hospital Center in New York, NY. He has been in private practice since 2005 at Pulmonary and Sleep Consultants in Sioux Falls, SD

The Sioux Falls Sleep Center is led by Dr. Rizan Hajal. Dr. Hajal has been actively involved in sleep medicine since 1999, taking part in more than 20,000 sleep studies. With his double board certification from the American Board of Sleep Medicine and the American Board of Internal Medicine Subspecialty Board in Sleep Medicine, Dr. Hajal has achieved one of the highest distinctions among sleep specialists.


Snigdha Sagar, MD

Snigdha Pusalavidyasagar did her residency in Internal Medicine. She worked for two years with Dr. Virend Somers in the Cardiovascular Physiology at Mayo Clinic, Rochester, MN and completed a fellowship at the Mayo Clinic in Sleep Medicine. She is currently an Assitant Professor of Medicine at the University of Minnesota in the Division of Pulmonary/Critical Care/Sleep Medicine. She is a medical director for the sleep center in Hutchinson, MN. Her research interests include sleep apnea and cardiovascular disease.

Dr. Lisa Viola-Neurology Associates

Lisa Viola D.O. is a well-respected and accomplished neurologist, passionate about her work and the premier neurological care that her team provides to patients. Dr. Viola completed her training at Albert Einstein College of Medicine in New York City, after which she fulfilled a fellowship in clinical neurophysiology and neuromuscular diseases, specializing in EMG training. She is board certified in three specialties which include neurology, clinical neurophysiology and electrodiagnostic medicine.


Dr. Scott Helberg-Sanford Health

Dr. Helberg, board certified in Pulmonary Medicine and Ciritical Care Medicine is also an investigator and regional speaker on strategies and interventions to decrease mechanical ventilator time and hospital stays for critically ill patients. Dr. Helberg is a recognized expert in sedation and delirium diagnosis and treatment.  Dr. Helberg is  married, a born and raised South Dakotan, and is an avid musician who enjoys singing and playing piano.


Naresh Dewan, MD

Dr. Dewan is Professor of Medicine Medical Director at CU & OVAMC Sleep Disorders Center in Omaha Nebraska. He is board certifieid in Internal Medicine, Pulmonary Medicine, Critical Care Medicin and Sleep Medicine. His areas of expertise inclde sleep apnea, chronic obstructive lung disease, asthma, lung nodules and pulmonary infections. He attended medical school at Government Medical College Hospital in Nagpur India, residency at St. Joseph's Hospital, Northwestern University in Chicago Illionois and his fellowship at Creighton University Medical Center in Omaha Nebraska.


Zacharay Depew, MD

Dr. Depew is Director of Interventional Pulmonology, CHI Health Division Chief of Pulmonary, Critical Care and Sleep Medicine, and Assistant Professor of Medicine. He is board certified in Internal Medicine, Pulmonary Disease and Critical Care Medicine. He attended medical school at Creighton University School of Medicine in Omaha Nebraska, completed his residency at Creighton University Medical Center and his fellowship at Mayo Clinic in Rochestor Minnesota.



ARCS Conference

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Conference Location

Hilton Garden Inn

Downtown Sioux Falls

201 E. 8th St

Sioux Falls, SD 57103

Conference Date

October 14th, 2016

8:00 am - 5:00pm

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