Fellowship Doctors

William McAllister, M.D.

“After extensive experience treating patients with debilitating and degenerative illnesses, I appreciate the opportunity to be a part of Cenegenics in the research, education and treatment of preventable diseases that occur with aging.”


Born and raised in South Dakota

Undergraduate College:

South Dakota College – Brookings SD

Iowa State College – Ames Iowa

Medical School:

Northwestern Medical School, Chicago Illinois (Graduated with honors AOA)



Oregon Health and Science University, Portland Oregon


General Surgical Residency:

Oregon Health and Science University, Portland Oregon


Clinical Practice:

Portland Oregon general surgery with a special interest in endocrine and vascular surgery



St Vincent (Providence Health System)

Emanuel (Legacy Health System)

Meridian Park Hospital (Legacy Health System)

Good Samaritan Hospital (Legacy Health System)




American Board of Surgery

American College of Surgeons

Oregon Medical Association

Washington County Medical Society

Portland Surgical Society

Portland Vascular Society

AOA Honor Medical Society


Clinical Positions

Chief of Surgery and Director of Surgical Education –

St Vincent Hospital

Clinical Teaching Faculty – Oregon Health and Science    University


Habib Khan, M.D.

“I have been a practicing physician for 17 years specializing in Neurological, sleep, age management and Balance disorders, with special interest in Neuro-cognitive and Neuro-degenerative diseases. I completed my training and spent my early career at University of Medicine and Dentistry (UMDNJ), New Jersey. I then completed my Sleep Fellowship at State University New York (SUNY) at Stony Brook, NY and decided to move to . I then grew a large successful private practice in Casa Grande, . Always challenged by the need to innovate medicine I continued to further my education and explore new horizons to practice Medicine Of Future, Today. This led me to peruse a career in Age Management Medicine focusing on the Prevention of chronic illnesses and degenerative disorders and Regenerative medicine improving longevity and helping high performance executives, elites and athletes to enhance their performance. I have recently joined Cenegenics Phoenix, as partner to help some of the most powerful leaders in business and society from around the world with Age Management Medicine.”

Work & Experience:

  • Consultant Neurologist and Sleep Specialist, AZ Institute Of Neurology & Polysomnography, 2003 – Present
  • Consultant Neurologist and Sleep Specialist, Casa Grande Regional Medical Center, 1999 – 2003

Post Graduate Training:

  • Fellowship Sleep Medicine at SUNY, Stony Brook, NY, USA. 1998 – 1999
  • Residency Neurology and Internal Medicine at UMDNJ, Newark, NJ, 1994 – 1998


  • Diplomat American Board Of Psychiatry & Neurology
  • Board Eligible American Board Of Sleep Medicine.
  • Diplomat Of Age Management Medicine Of Cenegenics Medical Institute


  • American Medical Association
  • American Association Of Neuromuscular and Electro diagnostic Medicine
  • American Association Of Sleep Medicine
  • American Society Of Ultra sound Medicine
  • American Society Of Balance Medicine
  • American Society Of Neuroradiology
  • American Association Of Anti aging Medicine




Ernesto M. Gomez, M.D.


  • Top Docs – Phoenix Magazine (2001, 2012, 2013)
  • Patient Choice Award (multiple)
  • Compassionate Doctor Award (multiple)
  • Colorado Obstetrics and Gynecology Award


  • Cenegenics Fellowship Physician
  • Cenegenics Physician Partner
  • Voluntary recertification (2000, 2002-2003, 2005-2008, 2010-2013)
  • American Board of Obstetrics and Gynecology

Areas Of Expertise

  • Diagnosis and treatment of hormone imbalance
  • Male/female bioidentical hormone replacement and pellet therapy
  • Age management medicine
  • Weight loss therapy
  • Gynecologic surgery (minimally invasive and robotic)

Committee Appointments

  • Banner Heart Hospital – Women’s Heart Center Physician Advisory Panel
  • Banner Baywood OB-GYN
  • Previous Chairman of Department of Obstetrics and Gynecology
  • Previous Vice-Chairman of Department of Obstetrics and Gynecology


  • Age Management Medicine Education Foundation
  • Medical Association
  • Maricopa County Medical Society
  • American Association of Gynecologic Laparoscopists
  • Fellow of American College Obstetrics and Gynecology


  • Spokesperson for Glaxo Smith Kline on Osteoporosis and Herpes Simplex Virus
  • Spokesperson for Warner Chilcott
  • Surgical Proctor for American Medical Systems


  • Mesa Obstetricians and Gynecologists, Ltd., 1981-Present
  • Cenegenics Medical Institute, 2000, 2014


  • MD, University of Colorado Medical Center, 1973-1977
  • BS, University of (B.S. Degrees: Math & Biology), 1969-1973

Post-Graduate Training

  • University of Colorado Health Sciences Center (Internship & Residency), 1977-1981
Dr. C.B. Daniel Cenegenics AZ Elite Health and Age Management