Thomas Gretter, MD

Department Neurology
Primary Location Cleveland Clinic Main Campus
Type of Doctor Adults Only
Languages English
Surgeon No
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Specialties & Treatments

Treatment & Services

  • Adult Neurology
  • General Neurology
View all 2 Treatment & Services +

Specialty in Diseases & Conditions

  • Alzheimer's and Dementia
  • Amyloidosis
  • Amyotrophic Lateral Sclerosis (ALS)
  • Anxiety Disorder
  • Aphasia
  • Arachnoid Cysts
  • Arachnoiditis
  • Atherosclerosis (vascular)
  • Central Nervous System Vasculitis
  • Cluster Headaches
  • Creutzfeldt-Jakob Disease
  • Dementia
  • Dermatomyositis
  • Dyslexia
  • Dystonia
  • Encephalitis
  • Encephalopathy
  • Essential Tremor Resources
  • Fibromyalgia
  • Frontotemporal Dementia
  • Growth Failure in Children with Kidney Disease
  • Guillain-Barre Syndrome
  • Headaches
  • Hemifacial Spasm
  • Huntington's Disease
  • Inclusion Body Myositis (IBM)
  • Lambert-eaton Myasthenic Syndrome
  • Memory Loss
  • Meningitis
  • Metabolic Diseases
  • Metabolic Syndrome
  • Migraine Headaches
  • Multiple System Atrophy
  • Musculoskeletal Pain
  • Myoclonus (muscle twitch)
  • Narcolepsy
  • Neurapraxia
  • Neuropathy
  • Neuropathy - Diabetic
  • Olivopontocerebellar Atrophy
  • Parkinson's Disease
  • Periodic Paralysis
  • Polymyositis
  • Porphyria
  • Post-polio Syndrome
  • Progressive Supranuclear Palsy
  • Radiculopathy
  • Ramsay Hunt Syndrome Types 1 & 2
  • Refsum Disease
  • Restless Leg Syndrome
  • Sarcoidosis
  • Shingles (Varicella-Zoster Virus)
  • Shy-Drager Syndrome
  • Soto's Syndrome
  • Spasticity
  • Spondylosis
  • Stenosis - Spinal
  • Stiff-Person Syndrome
  • Syringomyelia
  • Temporal Arteritis
  • Temporomandibular Disorders
  • Tension Headaches
  • Thoracic Outlet Syndrome
  • Traumatic Brain Injury
  • Vasculitis
  • Wilson Disease
View all 66 Specialties +


Is Cleveland Clinic Part of Your Insurance?

Review a list of accepted insurance plans for our Northeast Ohio locations or learn more about purchasing a contracted managed care plan.

View All Plans
Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Residency - University of Iowa Hospitals and Clinics
Iowa City, IA USA

Internship - Milwaukee County Hospital
Rotating Internship
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


  • Neurology

Specialty Interests

Adult General Neurology, Aging Brain, Dementia, Multiple Sclerosis, Pain, Headache including Migraine and Migraine Variants, Movement Disorders, Sjorgren's

Research & Publications

Research & Publications

See publications for Thomas Gretter, MD.

(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.)

Industry Relationships

Industry Relationships

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.

Patient Satisfaction Reviews

63 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.

Overall Star Ratings
4.7 out of 5
Explains 4.7
Listens 4.8
Courtesy, Respect & Concern 4.8
Knows Medical History 4.6
Time Spent with Patient 4.8
Patient Rating of Doctor 4.6

3 Patient Comments

Reviewed on Jan 18, 2017

Dr. Gretter is one of the best providers I've ever had & I've had plenty!! Will miss him greatly.

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.

Related Videos Featuring Thomas Gretter, MD