Treatment & Services
- Adult Neurology
- General Neurology
Specialty in Diseases & Conditions
- Alzheimer's and Dementia
- Amyotrophic Lateral Sclerosis (ALS)
- Anxiety Disorder
- Arachnoid Cysts
- Atherosclerosis (vascular)
- Central Nervous System Vasculitis
- Cluster Headaches
- Creutzfeldt-Jakob Disease
- Essential Tremor Resources
- Frontotemporal Dementia
- Growth Failure in Children with Kidney Disease
- Guillain-Barre Syndrome
- Hemifacial Spasm
- Huntington's Disease
- Inclusion Body Myositis (IBM)
- Lambert-eaton Myasthenic Syndrome
- Memory Loss
- Metabolic Diseases
- Metabolic Syndrome
- Migraine Headaches
- Multiple System Atrophy
- Musculoskeletal Pain
- Myoclonus (muscle twitch)
- Neuropathy - Diabetic
- Olivopontocerebellar Atrophy
- Parkinson's Disease
- Periodic Paralysis
- Post-polio Syndrome
- Progressive Supranuclear Palsy
- Ramsay Hunt Syndrome Types 1 & 2
- Refsum Disease
- Restless Leg Syndrome
- Shingles (Varicella-Zoster Virus)
- Shy-Drager Syndrome
- Soto's Syndrome
- Stenosis - Spinal
- Stiff-Person Syndrome
- Temporal Arteritis
- Temporomandibular Disorders
- Tension Headaches
- Thoracic Outlet Syndrome
- Traumatic Brain Injury
- Wilson Disease
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Education & Professional Highlights
Education & Fellowships
Residency - University of Iowa Hospitals and Clinics
Iowa City, IA USA
Internship - Milwaukee County Hospital
Milwaukee, WI USA
Medical School - University of Pennsylvania School of Medicine
Philadelphia, PA USA
Undergraduate - University of North Dakota
Grand Forks, ND USA
Undergraduate - University of North Dakota
Grand Forks, ND USA
Adult General Neurology, Aging Brain, Dementia, Multiple Sclerosis, Pain, Headache including Migraine and Migraine Variants, Movement Disorders, Sjorgren's
Research & Publications
(Disclaimer: This search is powered by PubMed, a service of the U.S. National Library of Medicine. PubMed is a third-party website with no affiliation with Cleveland Clinic.)
Cleveland Clinic physicians and scientists may collaborate with the pharmaceutical or medical device industries to help develop medical breakthroughs or provide medical expertise or education. Cleveland Clinic strives to make scientific advances that will benefit patient care and support outside relationships that promise public benefit. In order for the discoveries of Cleveland Clinic physicians' and scientists' laboratories and investigations to benefit the public, these discoveries must be commercialized in partnership with industry. As experts in their fields, Cleveland Clinic physicians and scientists are often sought after by industry to consult, provide expertise and education.
To assure professional and commercial integrity in such matters, Cleveland Clinic maintains a program that reviews these collaborations and, when appropriate, puts measures in place to minimize bias that may result from ties to industry. Cleveland Clinic publicly discloses the names of companies when (i) its physicians/scientists receive $5,000 or more per year (or, in rare cases, equity or stock options) for speaking and consulting, (ii) its physicians/scientists serve as a fiduciary, (iii) its physicians/scientists receive or have the right to receive royalties or (iv) its physicians/ scientists hold any equity interest for the physician's/scientist's role as inventor, discoverer, developer, founder or consultant.* In publicly disclosing this information, Cleveland Clinic tries to provide information as accurately as possible about its physicians' and scientists' connections with industry.
As of 7/7/2016, Dr. Gretter has reported no financial relationship with industry that is applicable to this listing. In general, patients should feel free to contact their doctor about any of the relationships and how the relationships are overseen by Cleveland Clinic. To learn more about Cleveland Clinic's policies on collaborations with industry and innovation management, go to our Integrity in Innovation page.
Public Health Service-Reportable Financial Conflicts of Interest. Cleveland Clinic scientists and physicians engage in basic, translational and clinical research activities, working to solve health problems, enhance patient care and improve quality of life for patients. Interactions with industry are essential to bringing the researchers' discoveries to the public, but can present the potential for conflicts of interest related to their research activities. Click here to view a listing of instances where Cleveland Clinic has identified a Public Health Service (PHS)-Reportable Financial Conflict of Interest and has put measures in place to ensure that, to the extent possible, the design, conduct and reporting of the research is free from bias.
* Cleveland Clinic physicians and scientists subscribe to the guidance presented in the PhRMA Code on Interactions with Healthcare Professionals and the AdvaMed Code of Ethics on Interactions with Health Care Professionals. As such, gifts of substantial value are generally prohibited.
66 Patient Satisfaction Reviews
The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
Responses are measured on a scale of 1 to 5 with 5 being the best score.
The comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Cleveland Clinic.
|Courtesy, Respect & Concern||4.8|
|Knows Medical History||4.5|
|Time Spent with Patient||4.8|
|Patient Rating of Doctor||4.6|
3 Patient Comments
Reviewed on Jun 6, 2016
Dr. Gretter's treatment has changed my life for the better. My migraines were debilitating, causing me to miss work or to miss time with my children. However, following his treatment plan has reduced the number of migraines I experience each month and has helped me continue with my daily life when they do occur.
Reviewed on May 3, 2016
Doctor Gretter has explained everything very clearly in terms that make it very easy to understand.
Reviewed on Mar 24, 2016
I absolutely love Dr. Thomas Gretter! He has been the best neurologist that I have seen for my migraine condition that I have ever seen. He makes me feel so comfortable and even thought we have gotten to the point where I can just do yearly visits, he remembers facts about me that do not pertain to my medical condition. When I first met Dr. Gretter, he was understanding of the pain and symptoms that I had been having. He believed me (and this was refreshing considering the last neurologist that i saw, said that I was a woman and depressed and prescribed prozac for me). I have been a patient of Dr. Gretter's for many years now and I think he is absolutely wonderful!
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