meet your team
Neurosurgeons
Dr. Clinton Baird, M.D.
Neurosurgeon
Dr. Morteza Sadeh, M.D., Ph.D
Neurosurgeon
Dr. Arvind Mohan, M.D.
Neurosurgeon
Dr. Jordan Amadio, M.D., M.B.A.
Neurosurgeon
PHYSICIANS
Dr. Nicole Abel, D.O.
Physician
Dr. Bryan Van Doren, M.D.
Physician
ADVANCED PRACTICE PROVIDERS
Nigel Adashefski
Neurosurgery P.A.
Felicia Male Van Rensburg
Pain Management P.A.
Savannah Doughty
APRN
Katie Pankowsky
APRN
Regenia Hilton
APRN
ADMINISTRATION
Logan Harkness USN (Ret)
Practice Manager
Tyesha Jamison
Credentialer/Dir. of Physician Relations
Waylon Henderson
Laboratory Manager
Susan Austin USA (Ret)
Director of Billing
REGIONAL MANAGERS
Amanda Smith
Regional Manager
Sierrah Burch
Regional Manager
STAFF
Lyris Craig
Medical Assistant
Lee Marie
Medical Assistant
Lorraine Gonzales
Medical Assistant
McKenzie Gerber
Receptionist
Joshua Foley
Records Manager
Lacey Cooper
Phone Team Manager
MARKETING
Natalie Bladen
Physician Liaison
MCALESTER OFFICE
Dr. Nicole Abel
DO
Savannah Doughty
APRN
Amanda Smith
Regional Manager
Stormi Harden
Medical Assistant
Denise Tapscott
medical assistnat
Amber Armstrong
FRONT DESK
Start Your Journey to Better Health at Olympia Institute
Take the first step towards a healthier, happier you at Olympia Institute. Our dedicated team of medical professionals is ready to guide you on your path to optimal well-being. Notice to patients. As of June 24, 2026 Dr. Sadeh will begin delivery patient care outside the ONI group. ONI will accept continuing care.
Texas Locations
AUSTIN
- 4207 James Casey Street, Suite 111
GEORGETOWN
- 1502 Blue Ridge Dr Suite 301
Oklahoma Locations
TULSA
- 6130 E 81st St
MEEKER
- 102 W Carl Hubbell Blvd
WAGONER
- 1317 S Dewey Ave
McALESTER
- 1030 East Washington Street