meet your team
NEUROSURGEONS
Dr. Clinton Baird, M.D. | TX
Neurosurgeon | C.E.O.I feel it an honor to be involved in the neurosurgical, spine and pain care of my patients. With hard work and training from the Johns Hopkins hospital I aim to treat every person as an individual. Our hospital partners allow the best care delivery and outcomes possible with expertise and compassion.
Dr. Jordan Amadio, M.D. | TX
NeurosurgeonJordan Amadio, M.D., is a board-certified neurosurgeon, and his clinical practice focuses on minimally invasive spine surgery, surgical neuro-oncology and neurotrauma. Amadio received his medical education at Harvard Medical School and the Massachusetts Institute of Technology before completing a neurosurgery residency at Emory University.
Dr. Moreteza Sadeh, M.D. Ph.D | TX
NeurosurgeonDr. Morteza Sadeh is one of Olympia Neurological Institute’s neurosurgeons. He received his medical degree from Chicago Medical School. He also speaks multiple languages, including Farsi. He specializes in brain & spinal tumor, epilepsy surgery, and neurosurgical spine surgery. He has more than 20 publications and over 200 citings.
Dr. Arvind Mohan, M.D., M.B.A. | TX
NeurosurgeonDr. Mohan was born and raised in Houston, Texas. He attended Yale University and graduated with a B.S. in Intensive Molecular, Cellular and Developmental Biology. In college, Dr. Mohan was involved in global health project management and traveled to India, Botswana, and Angola to work on the implementation of healthcare delivery projects.
PHYSICIANS
Dr. Nicole Abel, D.O. | OK
Pain ManagementOlympia Neurological Institute is excited to introduce a dedicated healthcare professional making a real difference in our community – Dr. Nicole Abel! – Dr. Abel is a trusted primary care provider with a special focus in pain management. She’s known for her compassionate care, personalized treatment plans and a deep commitment to helping her patients live healthier, comfortable lives.
Dr. William O’Brien, M.D. | OK
Pain Management & Internal MedicineDr. William O’Brien — Now serving Wagoner Oklahoma brings decades of trusted care to families in our community, offering everything from routine checkups to pain management managing complex health concerns with compassion and expertise. With a legacy built on patient-first care, Dr. O’Brien is here to help you live your healthiest life.
ADVANCED PRACTICE PROVIDERS
Sheila Leach, APRN | OK/TX
Behavioral HealthShelia Leach is a Psychiatric Mental Health Nurse Practitioner-Board Certified by the American Nurses Credentialing Center. She graduated Summa Cum Laude with a Master of Science in Nursing from Walden University, where she also earned her B.S.N.. Her expertise lies in caring for individuals who have sufferred significant physical and mental trauma. She enjoys spending time with family attending plays and concerts, traveling, decorating and walking my dog, Zoe.
Regenia Hilton, APRN | OK
Pain ManagementDriven by compassion and grounded in clinical expertise, Regenia is a dedicated nurse practitioner known not just for her skill, but for her signature hugs that put people instantly at ease. Her career has been shaped by a deep understanding of both science and the human experience, allowing her to bring empathy, precision and adaptability to every patient interaction. Outside the clinic you’ll find her watching birds, tending to her garden or savoring a quiet moment with a good cup of coffee.
Savannah Doughty, APRN | OK
Pain ManagementSavannah is a board-certified Family Nurse Practitioner by the American Academy of Nurse Practitioners. She is board-certified in Pain Management Nursing. Savannah attended Oklahoma State University – Institute of Technology where she earned an Associates Degree in Nursing. she worked as a Registered Nurse for eight years prior to advancing her practice. She later attended Chamberlain College of Nursing and graduated with a Master of Science in Nursing. Her goal is that all patients feel comfortable, welcome and heard while they are being seen in the clinic.
ADMINISTRATION
Logan Harkness, M.H.A., U.S. Navy (Ret.)
Practice ManagerLogan Harkness, MHA, is a dedicated Practice Manager with a rich background that informs his approach to healthcare management. Raised in the Midwest, he served honorably in the Navy as a medic for six years right after high school, where he developed a strong foundation in patient care and teamwork. Following his military service, Logan transitioned to Olympia Neurological Institute where he applied his skills in a civilian healthcare setting. Recognizing the importance of education in enhancing his capabilities, Logan pursued and earned both a bachelor’s and a master’s degree in healthcare administration along with billing and coding certifications.
Susan Austin, U.S. Army (Ret.)
Assistant Practice ManagerSusan joined Olympia Neurological Institute in 2022 as a Medical Biller and Coder. Since then she has advanced to the role of Assistant Practice Manager. Susan holds an Associate Degree in Health Science along with several professional certifications. In addition, she brings over 15 years of experience in the medical field to her current role. Susan is also a proud Veteran of the United States Army who was born and raised in Oklahoma. Susan takes great pride in her roots. Outside od work she enjoys skydiving, attending concerts and spending time outdoors with her family.
Lawrence Moran
Marketing DirectorLawrence Moran is a seasoned former Hollywood TV director and producer. With a diverse career spanning both entertainment and healthcare, Lawrence has directed primetime television favorites such as America’s Most Wanted and LIVE: The Grammys Red Carpet Experience. He is also the co-creator and host of the Paramount+ show How Hollywood Works with Warner Brothers UK President Josh Berger and helmed the pilot of 1921: Black Wall Street in 2021.
Triny
Practice Referral AdministratorTriny has been in the medical field for 19 years. She joined ONI Feb 2025 as your referral coordinator. Her passion for healthcare is incredible, She is truly here for patient care. Skilled in satisfaction and streaming referral workflows while collaborating with medical staff to enhance communication. Over the last 19 yrs in the medical field she has gained rapport with the medical industry. Outside of work she spends time with family and friends along with her fur baby.
Natalie Bladen
Marketing LeadAfter obtaining my marketing degree from Texas State University, my focus is providing strategic growth and community outreach for Olympia Neurological Institute. As someone who is passionate about proper healthcare, I work closely with physicians and staff to develop strategies that enhance visibility and connect patients to expert care.
Charissa Mefferd
BillingCharissa has been with ONI since December 2024. Prior to starting with ONI, I have done billing for 18 years. She has an associates in Accounting and a passion for the puzzle of billing and making sure patient’s claims get paid by insurance companies. Charissa enjoys chasing three active kids to all of their sport and school events, riding horses, golfing, time at the lake and the company of her husband and the small town neighbors and friends as well as their families.
Lyris Craig | Tulsa
Team Lead
Sierrah Burch | OK
Regional ManagerJennifer May
BillingJennifer May lives in Broken Arrow OK and has 3 children,1 grandbaby and 2 more on the way. She loves the beach, cooking, and gardening.
JASMINE | TULSA
ReceptionistStart 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.
Texas Locations
AUSTIN
- 4207 James Casey Street, Suite 111
CEDAR PARK
- 1401 Medical Parkway Building B, Suite 410
Oklahoma Locations
TULSA
- 6130 E 81st St
MEEKER
- 102 W Carl Hubbell Blvd
WAGONER
- 1317 S Dewey Ave
McALESTER
- 1030 East Washington Street