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Department Endocrinology, Diabetes and Metabolism
Primary Location Chagrin Falls Family Health Center
Type of Doctor Adults Only
Languages English, Greek
Surgeon No
Chagrin Falls Family Health Center
Primary Location

Chagrin Falls Family Health Center

Specialties & Treatments

Treatment & Services

  • Blood Tests
  • Diabetes Center
View all 2 Treatment & Services +

Specialty in Diseases & Conditions

  • Adrenal Tumors
  • Calcium Disorders
  • Conn's Syndrome
  • Diabetes
  • Goiter
  • Hyperaldosteronism
  • Hypercalcemia
  • Hyperparathyroidism
  • Hyperprolactinemia
  • Hyperthyroidism
  • Hypothyroidism
  • Parathyroid Disease
  • Primary Hyperaldosteronism
  • Prolactin Excess States
  • Prolactinoma
  • Thyroid and Pregnancy
  • Thyroid Cancer
  • Thyroid Disease
  • Thyroid Nodule
  • Turner Syndrome
  • Vitamin D Deficiency
View all 21 Specialties +


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About Mary Vouyiouklis Kellis, MD

Dr. Mary Vouyiouklis Kellis received her B.A. from Columbia University in New York City, where she graduated Magna Cum Laude.  She then attended medical school at Albert Einstein College of Medicine in the Bronx.  She completed her Internal Medicine Residency at NYU Langone Medical Center.  She also served as Chief Resident of the Internal Medicine Residency program.  She continued on at NYU Langone Medical Center, where she completed her fellowship in Endocrinology, Diabetes and Metabolism. 

After her fellowship, Dr. Vouyiouklis Kellis worked in private practice for 3 years and was voluntary faculty and a member of the Endocrinology Department at NYU Langone Medical Center, where she was involved in the teaching of medical residents and fellows. 

She was an attending physician at NYU Tisch Hospital, Bellevue Hospital, as well as the Manhattan VA Hospital.  She moved to Cleveland in September 2012 and has been a staff member in the Endocrinology, Diabetes and Metabolism Department here at the Cleveland Clinic since October 2012.

Education & Professional Highlights

Education & Professional Highlights


Education & Fellowships

Fellowship - NYU Langone Medical Center
Endocrinology, Diabetes & Metabolism
New York, NY

Residency - NYU Langone Medical Center
Internal Medicine
New York, NY

Medical Education - Albert Einstein College of Medicine
New York, NY

Undergraduate - Columbia University
New York, NY


  • Internal Medicine - Endocrinology, Diabetes and Metabolism

Specialty Interests

Thyroid disorders, thyroid and pregnancy, thyroid cancer, multiple endocrine neoplasia, adrenal masses, Type 1 and Type 2 diabetes, Turner's syndrome, hyperparathyroidism

Awards & Honors

  • "Top doctor" in Cleveland Magazine 
  • "Top doctor" by Castle Connolly 
  • 2007-2008 "Fellow of the Year" Award (Endocrinology), NYU Langone Medical Center/Bellevue Hospital
  • 2006-2007 Chief Resident (Internal Medicine Residency), NYU Langone Medical Center/Bellevue Hospital
  • 2004 Award for Clinical Excellence (Department of Internal Medicine), NYU Langone Medical Center/Bellevue Hospital
Research & Publications

Research & Publications

See publications for Mary Vouyiouklis Kellis, 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 4/18/2024, Dr. Vouyiouklis Kellis has reported the financial relationships with the companies listed below. 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

223 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
4.9 out of 5
Explains 4.9
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.9

41 Patient Comments

Reviewed on Jun 10, 2024

Dr kellis is excellent. Very thorough and very nice.

Reviewed on Jun 10, 2024

I have recommended her to other people and they have liked her very much also.

Reviewed on May 21, 2024

Dr. Mary is a wonderful doctor. Very concerned about my ability to pay for medicines needed. Directed me to advocates.

Reviewed on May 7, 2024

Dr. Kellis a an awesome doctor with a lot of understanding and a big heart

Reviewed on May 6, 2024

Dr Kellis was very attentive, thorough and professional

Reviewed on May 6, 2024

A patient and caring doctor with impressive experience and expertise. Discussed my labs and treatment plan in a way that was easy to understand and thoughtful in regard to my concerns. A wonderful clinician.

Reviewed on May 6, 2024

I'm a new patient of Dr Kellis & was very impressed with her!

Reviewed on Apr 29, 2024

I went to Dr. Kellis because I have trust in her medical decisions.

Reviewed on Apr 23, 2024

Dr. Kellis is everything positive one could imagine in a physician: listens carefully, explains clearly and presented herself In a way that allowed me to feel very confident In her ability to assess and take care of my problem. She even called me to discuss my test results and decide upon the best way to proceed.

Reviewed on Apr 15, 2024

Great, caring doctor!

Reviewed on Apr 15, 2024

Dr. Kellis even called me back after I hung up on her accidentally. She cares.

Reviewed on Mar 27, 2024

I think Dr Kellis is wonderful!! She is very personable and caring!!

Reviewed on Feb 28, 2024

Dr. Kellis is an exceptional physician. She listened to my testimony and offered an effective solution. She even went to bat for me when my insurance wouldn't cover her recommendation and helped them reverse their decision. Because of her exemplary professional care and some work on my part, I've lost over 70 pounds, reduced the need for other medications, and feel better about myself than I have in a long time!

Reviewed on Feb 6, 2024

Always an excellent experience with Dr kellis, she is thoughtful and includes me in decision making regarding my diabetes management.

Reviewed on Feb 5, 2024

I had a great experience this visit. I was recommended to Dr. Kellis by my daughter because she thought so highly of her. I was not disappointed. Dr. Kellis asked many questions and answered my questions in a clear concise manner.

Reviewed on Jan 29, 2024

Not only just the doctor have amazing bedside manners, but she's also a very precise clinician and diagnostician!! She is wonderful and I could not recommend anyone more

Reviewed on Jan 15, 2024

Dr Kellis has always been very kind and professional. She always takes time to listen and is very personable too.

Reviewed on Jan 9, 2024

Dr Kellis always comments on the test results received in My Chart. Very appreciated and reassuring.

Reviewed on Dec 6, 2023

Doctor Kellis and her team are a great asset for the Cleveland Clinic. Doctor Kellis is a very bright and caring person as reflected in my visit.

Reviewed on Nov 28, 2023

Dr. Kellis has always considered my concerns; respects my opinions, and shares the pros and cons of my decisions.

Reviewed on Nov 20, 2023

Dr. Mary Vouyiouklis Kellis is amazing, I'm so thankful to have her as my doctor!

Reviewed on Nov 7, 2023

Dr. Kellis is a wonderful, caring doctor. I would recommend her to everyone!

Reviewed on Oct 30, 2023

Dr. Vouyiouklis is an outstanding doctor!She listens to her patients and explains everything very clearly.She cares and will go to great lengths to help. She keeps her patients informed very fast of any test results etc something that I appreciate very much! I would strongly recommend her to other patients and I wish I could thank her enough for the care she has provided for me.

Reviewed on Oct 25, 2023

Appointment was on time - and Dr Kellis was thorough and well informed- I will return for a yearly check- up

Reviewed on Oct 25, 2023

Dr Mary is a great doctor would recommend her forever

Reviewed on Oct 23, 2023

My experience with Dr. Kellis is always wonderful. She is knowledgeable and professional.

Reviewed on Oct 23, 2023

I have recommended Dr. Kellis to my friends and colleagues.

Reviewed on Oct 23, 2023

Dr. Kellis customizes the treatment for me as an individual and not as part of the general population.

Reviewed on Oct 9, 2023

DR was professional and explained things clearly, and answered my questions.

Reviewed on Sep 26, 2023

Dr. Kellie is a great doctor. Her knowledge care and concern is what makes her such a great doctor. I feel very lucky I have her a my doctor.

Reviewed on Sep 26, 2023

Very pleased...she was very concerned and helpful. Made me feel at ease.

Reviewed on Sep 19, 2023

Took a while for me to get an appointment as Dr. Kellis is very busy, but it was worth the wait. Dr. Mary Kellis is an excellent physician.

Reviewed on Sep 19, 2023

Dr. Mary V. Kellis is an excellent Physician. This was my first visit with Dr. Mary Kellis and I was very impressed.

Reviewed on Sep 19, 2023

Dr Kellis is always nice and professional and I have recommended her before

Reviewed on Sep 13, 2023

Dr. Kellis Was very friendly, informative about my condition. I like her a lot and was very comfortable being in her care.

Reviewed on Sep 6, 2023

Dr. Mary is the best in my eyes, she took me on the very first time I need a professional diabetic doctor. Shes great!!!!

Reviewed on Aug 30, 2023

She was in amd out quicker than usual. I didn't like that.

Reviewed on Aug 23, 2023

I am definitely already recommending Dr. Kellis to my family and friends. Her demeanor and attitude instantly put me at ease, I felt listened to, and she was so very knowledgeable about even the smallest of details like the color of the pills that are prescribed. And even after the visit, when I had complications from the medication, she immediately sent a new script (even while she was on PTO!). Dr. Kellis is a superb physician and I am so grateful to her for her help!

Reviewed on Aug 22, 2023

I had very little sleep and Dr Kellis was very concerned about why unable sleep and if I was safe to get home . She is a very caring person. And she fit me in her busy schedule when I was late .

Reviewed on Jul 18, 2023

Dr Kellis and staff were very helpful and attentive!

Reviewed on Jul 14, 2023

She was great

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