Meet Our Team

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Anna Wanahita, M.D.

Anna Wanahita, M.D.

Co-Medical Director, St. John Heyman Stroke Center; Medical Director of Stroke Services, St. John Health System

Gender

Female

Education

Fellowship: University of Louisville
Residency: neurology, University of Louisville
Internship: internal medicine, University of Louisville

Organizations

American Academy of Neurology
American Heart Association/American Stroke Association
American Medical Association
Society of Vascular and Interventional Neurology

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Patrick Han, M.D.

Patrick Han, M.D.

Co-Medical Director, St. John Heyman Stroke Center; Medical Director, St. John Neuroscience Institute

Gender

Male

Education

Fellowships: cerebrovascular and skull-based surgery, endovascular neurosurgery and complex spinal surgery, Barrow Neurological Institute
Residency: Barrow Neurological Institute, 1998
Internship: surgery, Phoenix Integrated Surgical Residency, 1998
Medical school: University of Kansas School of Medicine, 1997

Organizations

American Association of Neurological Surgeons
Congress of Neurological Surgeons
Joint Section on Cerebrovascular
North American Skull Base Society

Misc

ADVANCED STUDIES
CyberKnife® radiosurgery

SUBSPECIALTY INTERESTS
Cerebrovascular and skull-based surgery
Aneurysm clipping
Carotid endarterectomy
Endovascular neurosurgery
Coil embolization of brain aneurysm
Carotid stent
Stereotactic radiosurgery
AVM, brain tumor trigeminal neuralgia
Complex spine surgery
Minimally invasive spine surgery

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Justin Thankachan, M.D.

Justin Thankachan, M.D.

Co-Vice Director, Stroke Service and St. John Heyman Stroke Center; Stroke Hospitalist

Gender

Male

Education

University of Oklahoma College of Medicine, 2005
Residency: internal medicine, University of Oklahoma College of Medicine

Organizations

American Heart Association/American Stroke Association
American Medical Association

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David Gilbert, M.D.

David Gilbert, M.D.

Co-Vice Director, Stroke Service and St. John Heyman Stroke Center; Stroke Hospitalist

Gender

Male

Education

Residency: internal medicine, University of Oklahoma College of Medicine, 2008
Medical school: University of Oklahoma College of Medicine, 2005
Pre-med: biology and chemistry, Southern Nazarene University

Organizations

American College of Physicians
American Heart Association/American Stroke Association
American Medical Association

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Daryl Thompson, M.D., FAHA

Daryl Thompson, M.D., FAHA

Stroke Neurology and Outpatient Stroke Clinic

Gender

Male

Education

Cerebrovascular diseases, The Cleveland Clinic Foundation, 1994-1995
Residency: neurology, The Cleveland Clinic Foundation, 1991-1994
Residency: internal medicine, The Cleveland Clinic Foundation, 1989-1991
Internship: The Cleveland Clinic Foundation, 1988-1989
Medical school: University of Missouri-Kansas City, 1982-1988

Organizations

American Academy of Neurology
American Heart Association/American Stroke Association
American Medical Association

Description

Specialty Board Certification

Vascular neurology, 2009
Neurology, 1996, 2007
Internal medicine, 1993

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Imad Uddin, M.D.

Imad Uddin, M.D.

Accepting New Patients

Yes

Gender

Male

Education

Residency: internal medicine, University of Oklahoma College of Medicine, 2008-2011
Medical school: Ross University School of Medicine, 2008
Pre-med: cognitive psychology, University of Kansas, 2004

Organizations

American College of Physicians
American Heart Association/American Stroke Association
American Medical Association

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Allan Suttle, M.D.

Allan Suttle, M.D.

Hospitalist, Outpatient Stroke Clinic

Gender

Male

Education

Chief resident: internal medicine, University of Oklahoma-Tulsa, 2010-2011
Residency: internal medicine, University of Oklahoma-Tulsa, 2008-2011
Doctor of Medicine: Ross University School of Medicine in Dominica, West Indies, 2004-2008
Bachelor of Science: biology, Arkansas State University, 1996-2000

Organizations

American College of Physicians
American Heart Association/American Stroke Association
Society of Hospital Medicine

Description

Board Certification

American Board of Internal Medicine, 2011

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Thomas White, M.D.

Thomas White, M.D.

Medical Director, Interventional Radiology

Gender

Male

Education

Master of Science: health care administration, Harvard School of Public Health, 2001-2003
Residency: University of Oklahoma College of Medicine, 1981-1985
Medical school: University of Oklahoma College of Medicine, 1977-1981

Organizations

Alpha Omega Alpha Honor Medical Society
American Medical Association
Cardiovascular and Interventional Radiology Society of Europe
Mid-America Interventional Radiology Society (vice president and founding member)
Oklahoma Medical Society
Radiological Society of North America
Society of Cardiovascular and Interventional Radiology
Tulsa Medical Society

Misc

BOARD CERTIFICATIONS
Diagnostic radiology with special competency in vascular and interventional radiology, 1995
Radiology, 1985

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Rodney Shaffer, M.D.

Rodney Shaffer, M.D.

Neuroradiologist

Gender

Male

Education

Neuroradiology, Northwestern University, Chicago, IL 2006
Ross University School of Medicine, 2000
Residency, Diagnostic Radiology Geisinger Medical Center, 2005
Internship, Preliminary Internal Medicine, Greater Baltimore Medical Center, 2001
Post Baccalaureate, University of Houston, 1995

Organizations

American College of Radiology
American Society of Neuroradiology
The Radiological Society of North America
American Medical Association
Oklahoma State Medical Association
Oklahoma State Radiological Society
Tulsa County Medical Society

Description

Appointments & Positions

Tulsa Radiology Associates Board Member
St. John Medical Center QA Committee
St. John Medical Center Stroke Committee
American Society of Neuroradiology

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Chad Phillips, M.D.

Chad Phillips, M.D.

Chairman of Emergency Medicine, St. John Medical Center; Co-Director, Emergency Department

Gender

Male

Education

Residency: emergency medicine, Wake Forest University
Medical school: University of Texas Southwestern Medical Center at Dallas
Pre-med: physiology, Oklahoma State University

Organizations

American Academy of Emergency Medicine

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Todd Dunaway, M.D.

Todd Dunaway, M.D.

Neurologist; electrophysiologist

Gender

Male

Education

Fellowship: neuromuscular disorders and electromyography, Oregon Health & Sciences University, 2002-2003
Chief residency: neurology, Oregon Health & Science University, 2001-2002
Residency: neurology, Oregon Health & Science University, 1998-2002
Medical school: University of Oklahoma College of Medicine, 1994-1998
Pre-med: Oklahoma State University, 1990-1994

Organizations

American Academy of Neurology
Oklahoma State Medical Association

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Ralph Richter, M.D.

Ralph Richter, M.D.

Neurologist; neuropsychiatrist

Gender

Male

Education

Residency: University of Oklahoma College of Medicine
Residency: NewYork-Presbyterian Hospital
Medical school: Columbia University, 1956

Organizations

American Academy of Neurology
American Medical Association
Oklahoma State Medical Society

Social & Civic

Advisory Board Member, Physicians and Surgeons Club, Columbia University College of Physicians and Surgeons
Advisory Board Member, Center College of Public Health, University of Oklahoma Health Sciences
Patient Care Subcommittee Member, Geriatric Neurology Task Force, American Academy of Neurology

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James Rooks, M.D.

James Rooks, M.D.

Medical Director, St. John Physicians' Hospitalists

Gender

Male

Education

Residency: internal medicine, University of Oklahoma College of Medicine
Medical school: University of Oklahoma College of Medicine

Organizations

American College of Physicians
Society of Hospital Medicine

Social & Civic

Associate Clinical Instructor, University of Oklahoma College of Medicine Department of Internal Medicine
Federal Legislative Representative

Description

Appointments & Positions

Director of Inpatient Services – St. John Medical Center
ICU Management Team – St. John Medical Center

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Annie Venugopal, M.D.

Annie Venugopal, M.D.

Physical Medicine & Rehabilitation Services

Gender

Female

Education

Residency: State University of New York at Brooklyn School of Medicine, 1976-1979
Residency: Christian Medical College, Vellore (India), 1974-1975
Internship: Christian Medical College, Vellore (India), 1973-1974
Medical school: Christian Medical College, Vellore (India), 1969-1973
Pre-med: medicine and surgery

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Sonja Boswell, MHS, PA-C

Sonja Boswell, MHS, PA-C

Clinical Educator

Gender

Female

Education

Master of Health Sciences in Physician Associate Program, University of Oklahoma Health Sciences Center, 2001
Bachelor of Science in Athletic Training, University of Tulsa, 1998

Organizations

American Academy of Physician Assistants
American Heart Association / American Stroke Association
Oklahoma Academy of Physician Assistants
Oklahoma Stroke Center Coordinator Consortium

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Mark Steichen, PA-C

Mark Steichen, PA-C

Gender

Male

Education

Master of Health Sciences: physician assistant studies, University of Oklahoma-Tulsa School of Community Medicine, 2011
Bachelor of Arts: Spanish, University of Illinois at Urbana-Champaign, 2001

Organizations

American Academy of Physician Assistants
Oklahoma Academy of Physician Assistants

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Brett Bennett, PA-C

Brett Bennett, PA-C

Accepting New Patients

Yes

Gender

Male

Education

Master of Health Sciences: physician assistant studies, University of Oklahoma Health Sciences Center, 1999

Organizations

Oklahoma Academy of Physician Assistants

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Heather Lorenz, RN, MSN

Heather Lorenz, RN, MSN

Stroke Program Coordinator

Gender

Female

Education

Master of Science in Nursing, University of Phoenix, 2006
Bachelor of Science in Nursing, Loma Linda University, 2003

Organizations

American Heart Association
American Stroke Association Council on Stroke
International Stroke Organization
World Stroke Organization