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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
Locations Specialties & Treatments

Treatment & Services

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

Specialty in Diseases & Conditions

  • Adrenal Tumors
  • Amenorrhea
  • Calcium Disorders
  • Conn's Syndrome
  • Cushing's Syndrome
  • Diabetes
  • Familial Multiple Endocrine Neoplasia
  • Galactorrhea
  • Goiter
  • Gynecomastia
  • Hyperaldosteronism
  • Hypercalcemia
  • Hyperparathyroidism
  • Hyperprolactinemia
  • Hyperthyroidism
  • Hypothyroidism
  • Menstrual Disorders
  • Parathyroid Disease Description
  • Pheochromocytoma
  • Primary Hyperaldosteronism
  • Prolactin Excess States
  • Prolactinoma
  • Thyroid and pregnancy
  • Thyroid Cancer
  • Thyroid Disease
  • Thyroid Nodule
  • Turner Syndrome
  • Vitamin D Deficiency
View all 28 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 USA

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

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

Undergraduate - Columbia University
New York, NY USA


  • 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

  • Listed as "Top doctor" in Cleveland Magazine in 2015 and 2016
  • Selected as "Top doctor" by Castle Connolly In 2015 and 2016
  • 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 10/26/2021, Dr. Vouyiouklis Kellis 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

136 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
4.8 out of 5
Explains 4.8
Courtesy, Respect & Concern 4.9
Patient Rating of Doctor 4.8

22 Patient Comments

Reviewed on Jun 8, 2022

She's a great doctor, so I know I need to schedule far in advance

Reviewed on May 18, 2022

Wonderful experience is the Dr. Very communicative and pleasant. I left feeling informed and have increased confidence in how to manage my illness.

Reviewed on Apr 6, 2022

Dr Kellis is a great doctor! I am sure that she will be able to help me with my diabetes.

Reviewed on Mar 29, 2022

Everything went well and really like the doctor

Reviewed on Mar 9, 2022

Love Dr. Kellis

Reviewed on Feb 1, 2022

Dr. Kellis is the best.

Reviewed on Jan 31, 2022

Dr Kellis has always been very supportive and caring and as well as her staff

Reviewed on Jan 26, 2022

Dr. Kellis is very personable and she is very knowledgeable about Margaret's diagnosis and treatment. She takes the time and talks to Margaret throughout the examination. Margaret has special needs and Dr Kellis never talks down to her or gives the Impression she Is uncomfortable caring for her.

Reviewed on Jan 25, 2022

This was a second opinion visit. I was thrilled that Dr. Kellis asked me if I had any questions or wanted to know more. She was so polite and professional.

Reviewed on Jan 25, 2022

Dr. Kelli's is excellent and knows her job!! A great endocrinologist. I would recommend her always.

Reviewed on Dec 1, 2021

Dr. Kellis was very kind, caring and thorough. Looking at all angles. She questioned my droopy eyelid and wanted to check for Graves. I did quite a bit of research to find the right Dr., and Im sooo glad I picked her.

Reviewed on Dec 1, 2021

Everyone was very helpful. Im new to the CC as my wife is a Rn for UH. Dr helped with mychart app process for me. All Very helpful and caring.

Reviewed on Nov 10, 2021

Dr. Kellis was the first physician to listen to what I was saying

Reviewed on Nov 9, 2021

I really like *Dr. Kellis. Very personal, relaxed & I've always been very comfortable with her as my doctor.

Reviewed on Nov 2, 2021

I drive from Concord Township to see Dr. Kellis because she is an excellent doctor, and I respect what she has to say. I saw her origin the Willoughby. She said she could recommend another doctor in her field that's closer, and I said I want to stay with her.

Reviewed on Oct 26, 2021

Every time I go to see Doctor Kellis she is a very caring Doctor and her staff is awesome also I always look forward to seeing her and her staff I rate them all one million percent

Reviewed on Oct 18, 2021

Dr Kellis always arrives on time for her video visits.

Reviewed on Oct 18, 2021

I recommend Dr Kellis to everyone who needs an endocrinologist. Dr Kellis is a wonderful doctor, who treats the individual not just an average for a population.

Reviewed on Oct 18, 2021

Dr Kellis helped me get back to a normal life and have little to no thyroid issues now.

Reviewed on Oct 11, 2021

Dr. Kellis is extremely helpful and understands my needs for my condition.

Reviewed on Sep 22, 2021

Dr. Kellis really listened to me and my issues. We talked about what to look for and a plan going forward. She thoroughly explained everything I had questions about. She took the time to get to me know my history to better help me.

Reviewed on Sep 21, 2021

Doctor Kellis treated me like I was a family member. She was amazing.

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