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Steven G. Hull, MD

Dr. Steven Hull grew up in southern Illinois where he completed his undergraduate work at the University of Illinois, in Champaign, attended medical school at the Southern Illinois University in Springfield and performed his internship and residency at St. Francis Medical Center, University of Illinois College of Medicine in Peoria, Illinois. Dr. Hull then moved to Kansas City to do a fellowship in pulmonary and critical care medicine from the Kansas University School of Medicine.

Dr. Hull made Kansas City his permanent home when he went to work for Kaiser Permanente. While with Kaiser Permanente, Dr. Hull served as Chief of Internal Medicine, Director of Quality/Risk Management, Director of the Sleep Disorders Clinic and then Associate Medical Director for Kaiser Permanente Medical Group of Mid-America. During those years, Dr. Hull went back to school and was awarded a certificate in the Executive Education Program from the University of North Carolina at Chapel Hill. Dr. Hull eventually left Kaiser Permanente to pursue his passion in sleep medicine and came to work for SomniTech in 2000 as Medical Director, working specifically with patients who had sleep disorders. Since then, Dr. Hull has been elected as President of SomniTech and also partners with Vince and Associates where he serves as the Director or Sleep Disorders and Vaccine Research where he spends the majority of his time. In his spare time, you may find Dr. Hull out on a golf course or enjoying time on his boat.

  • somniTech, Overland Park
  • somniTech, Lee's Summit
Scott E. Eveloff, MD

Dr. Scott Eveloff is a native of Kansas City. He completed his undergrad and medical school from Washington University in St. Louis, Missouri. His internship, residency and both fellowships (in critical care and pulmonary medicine) were performed at the Rhode Island Hospital in Providence Rhode Island. Dr. Eveloff remained in Rhode Island where he worked as a staff attending physician for 4 years and then became Associate Director of the Sleep Disorders Lab at Rhode Island Hospital. 

Dr. Eveloff returned to Kansas City in 1994 and began his career with Research Medical Center where he eventually became the Director of the Sleep Disorders Center at Research Medical Center.  In 2004. Dr. Eveloff left Research and came to work at SomniTech and assumed the position of the Medical Director of the Iowa sleep labs.  Dr. Eveloff also serves as a physician and sub-investigator at Vince and Associates Clinical Research in Overland Park.  When Dr. Eveloff is not working, he is busy spending time with his family and writing articles and books.

  • somniTech, Pleasant Hill
  • somniTech, Waukee
  • somniTech, Overland Park
  • somniTech, Lee's Summit
Eric Friskel, MD

Dr. Friskel grew up in Frontenac, Kansas. Once he graduated high school, Dr. Friskel attended Pittsburg State University and then headed off to Kansas University where he completed his medical school training and residency. Dr. Friskel continued his education at the University of Florida College of Medicine where he did fellowships in both pulmonary and critical care medicine and sleep medicine.

Dr. Friskel returned to the Midwest in 2003, worked for Kansas City Pulmonary Clinic at Research Medical Center.  He joined Midwest Sleep Specialists in 2006 where he now serves as Medical Director for  SomniTech’s Lee’s Summit, Northland and Lawrence sleep labs.

  • somniTech, Overland Park
  • somniTech, Lee's Summit
Jonathan D. Hardersen, PA-C

Jon is an Iowa native, who began his career in sleep disorders medicine in 2001 as a sleep technologist. Working in both the hospital and independent lab setting, he went on to obtain credentialing as a registered polysomnographic technologist. Jon later graduated from Northwestern College in Orange City, Iowa with a bachelor’s degree and graduated from Des Moines University’s Physician Assistant Program in Des Moines, Iowa. 

In 2006, Jon came to work for somniTech as our Physician Assistant under the direct supervision of our Medical Director, Scott Eveloff, M.D.  During Jon’s time off, you may find him in the Emergency Room helping others or on the golf course trying for that hole in one.  However, Jon’s biggest passion is spending time with the family and playing in the back yard with his 3 children.

  • somniTech, Pleasant Hill
  • somniTech, Waukee
Gregory Foster, MD
  • Med school – Wayne State University School of Medicine, Graduated 1979
  • Internship – Michigan State University (Internal Medicine) 7/79 – 6/80
  • Residency – Michigan State University (Internal Medicine) 7/80 – 6/82
  • Pulmonary/CCM Fellowship – Henry Ford Hospital (Critical Care) 7/82 – 7/84
  • National Board of Medical Examiners 
  • American Board of Internal Medicine
  • American Board of Internal Medicine – Pulmonary Medicine
  • American Board of Internal Medicine – Critical Care Medicine
  • American Board of Sleep Medicine
  • Nocturna, McKinney
  • Medical Center of McKinney Sleep Center
Marc Schlegal, RPA-C (716) 923-7326


  • Sleep Disorders Medicine
  • Parasomnias
  • Restless Legs Syndrome
  • Narcolepsy


  • Secondary REM behavior disorder
  • Restless Legs Syndrome and augmentation

Elmira College, B.A.


  • Daemen College, Amherst, New York
  • Masters Degree, Physician Assistant Studies
  • NCCPA, board certified
  • Completion of PA Surgical Examination
  • American Academy of Neurology (AAN) membership
  • American Academy of Sleep Medicine (AASM) membership
  • American Academy of Physician Assistants (AAPA) membership
  • Credentialed in F.A.S.T. Ultrasound
Thomson Chemplavil , MD
Dr. Thomson Chemplavil is a sleep medicine specialist, who is well experienced on the diagnosis and treatment of sleep disorders, especially sleep apnea. He is board certified in Sleep Medicine, Pulmonary and Critical Care Medicine.
He serves as the Medical Director for Nocturna
Sleep centers in Las Vegas/Henderson , Nevada.
Dr. Chemplavil earned his M.D. degree from Medical College, Kottayam (Mahatma Gandhi University), India. Subsequently, he underwent specialty training at the University of Illinois, Chicago, in Internal Medicine, Pulmonary and Critical Care and Sleep Medicine.
American Academy of Sleep Medicine
  • Nocturna, Henderson
  • Nocturna, Las Vegas
  • Nocturna Sleep Therapy, Henderson
  • Nocturna Sleep Therapy, Las Vegas
Freddie Morales, MD
Practices Internal Medicine, Pulmonary disease and Sleep Medicine, based out of Killeen/Waco, TX.
Graduated from the University of Puerto Rico school of Medicine in 1980
Completed residencies for Internal Medicine and Pulmonary disease at the University of Puerto Rico in 1983.
Amber Wellman, PA-C
Amber Wellman, PA-C specializes in Sleep Medicine and has been on staff at Nocturna of Tulsa since 2005. She has spent significant practice time in the specialties of Neurosurgery and Bariatric Medicine.

Ms. Wellman is the director of the CPAP Success Program at Nocturna of Tulsa. Under her direction and leadership, this program has led to treatment success rates that are among the highest in the nation.

Amber received her Bachelor of Science in Medical Technology and Master of Physician Assistant Studies from the University of Nebraska Medical Center and is certified by the National Commission on Certification of Physician Assistants.
  • American Academy of Sleep Medicine
  • American Academy of Physician Assistants
  • Oklahoma Academy of Physician Assistants
  • Nocturna, Tulsa
  • Nocturna, Tulsa
  • Nocturna Sleep Therapy, Tulsa
  • Nocturna Sleep Therapy, Tulsa
Billy Eden, MD
Board Certified in Pulmonary Disease, Internal Medicine, Sleep Medicine

Medical School:  University of Oklahoma- College of Medicine, Completed: 1973  

Wilford Hall Med Ctr Aetc
Completed: 1976  

Wilford Hall Hosptial  
Scott Medical Ctr
Pulmonary Disease  

  • Nocturna, Southlake
  • Nocturna, Bedford
Jana Loveless, MD

Dr. Jana Loveless grew up in Lubbock, Texas and completed her undergraduate work at Davidson College in Davidson, North Carolina. She attended OU-Tulsa for medical school and Internal Medicine residency. She was chief resident in 2003-2004.


Dr. Loveless made Tulsa, Oklahoma her home in 1990. She worked for Springer Clinic and Warren Clinic and had both inpatient and outpatient clinic duties. In 2010 she joined Nocturna and trained under Dr. Kevin Lewis. Dr. Loveless is currently the Medical Director for Nocturna of Tulsa. She took the American Board of Internal Medicine, Sleep medicine exam in Nov. of 2011.