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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
  • 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
  • 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 10/14/2022, 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

242 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

44 Patient Comments

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

Reviewed on Jun 26, 2023

Dr. Is very knowledgeable, communicated effectively and answered my questions and concerns.

Reviewed on Jun 13, 2023

The best Diabetes's Dr I ever seen.

Reviewed on Jun 13, 2023

Outstanding Remarkably Capable Doctor. Most importantly She CARES.

Reviewed on Jun 6, 2023

Dr Kelli's was so wonderful with my son. He is developmentally disabled and 20. She told him everything she was doing and approached him slowly so as not to upset him any further. I love that she has a very conservative plan to treat his diseases. I would highly recommend her to others. Thank you!

Reviewed on May 23, 2023

Both Dr. Kellis and her associate were amazing and efficient without making you feel rushed.

Reviewed on May 16, 2023

Dr. Kellis shared pros and cons of medication options very thoroughly.

Reviewed on May 16, 2023

Dr. Kellis was very attentive and helpful to me to understand my Diabetes.

Reviewed on May 15, 2023

Dr. Kellis was so pleasant, understanding & patient w/ me as I adjusted my own video connection!

Reviewed on May 9, 2023

Dr. Kellis is amazing! I moved to Ohio a year and a half ago. I could not ask for a better endocrinologist. I have had issues for twenty years and she is the best doctor I have experienced so far. Caring, knowledgeable, and a great listener!

Reviewed on Apr 24, 2023

Always a good experience with Dr. Kellis and her office staff.

Reviewed on Apr 24, 2023

Whether it is an in person or virtual appointment with Dr. Kelliis and her staff; it is always a pleasure. Dr. Kellis reviews blood work and talks to me to explain the results and answers all my questions. Dr. Kellis Is an exceptional doctor.

Reviewed on Apr 19, 2023

Dr. Kellis, is one of a kind, she is the best doctor I have ever seen for my condition. It is always a pleasure to come in.

Reviewed on Apr 18, 2023

Excellent physician listens ,caring and knowledgeable. The first endocrinologist that truly listens and cares about her patients and their lifestyles

Reviewed on Apr 17, 2023

I think Dr. Kellis is top notch but I found I asked fewer questions and had less discussion in a virtual appointment.

Reviewed on Mar 28, 2023

Dr. Kellis takes time with me, addresses my concerns and answers all my questions!

Reviewed on Mar 8, 2023

Dr. Mary Kellis and her nurse were very good

Reviewed on Mar 6, 2023

Easy to access what I need in the app and easy to communicate with my provider.

Reviewed on Mar 6, 2023

Dr Kellis always shows great concern for me and my care.

Reviewed on Feb 21, 2023

Dr. Kellis is a wonderful physician who always listens carefully to any concerns I have.

Reviewed on Feb 8, 2023

Dr. Kelli's is one of the few physicians I recommend; she is excellent - knowledgeable, listens, is always up to date on my medical issues, responds promptly to messages and with test results.

Reviewed on Feb 6, 2023

Dr. Vouyiouklis Kellis is the BEST! She is very passionate about her work and is very compassionate toward the patient. Her intelligence and confidence come across in every appointment I've had with her.

Reviewed on Feb 6, 2023

Dr Kellis and her office make it very easy!

Reviewed on Jan 31, 2023

Dr Kellie and hers staff were absolutely wonderful. I would highly recommend them

Reviewed on Jan 31, 2023

Dr Kellie is the BEST!

Reviewed on Jan 25, 2023

Dr. Kellis is always well-prepared for our visits. I deeply appreciate her knowledge, care and guidance!

Reviewed on Jan 9, 2023

Dr. Kellis is always pleasant, efficient, and thorough. She runs on time yet still answers your inquires.

Reviewed on Jan 9, 2023

Dr Kellis is top notch. I have never met her in person, we just fo virtual appointments, but they are quality appointments. She's smart, caring, and answers all my questions.

Reviewed on Jan 4, 2023

I pleased with the Chagrin staff and doctor.

Reviewed on Jan 4, 2023

Dr Mary Kellis is the best dr I have seen for my diabetes in 27 years. She helped me reach my A1c. The best!!!

Reviewed on Dec 5, 2022

Dr. Kellis has been my doctor for several years. I have stayed with her because she really listens to me.

Reviewed on Nov 30, 2022

First provider I have met able to competently address my thyroid issues and my choice to use iodine to supplement and advise me accordingly.

Reviewed on Nov 30, 2022

Nurse practitioner Emily Aufmuth Gunnoe was fantastic and her care combined with this provider was excellent.

Reviewed on Oct 31, 2022

Always enjoy appts w/Dr Kellis, very pleasant and thorough!

Reviewed on Oct 31, 2022

I like Dr Kelli's a lot!

Reviewed on Oct 24, 2022

Dr. Kellis has been great and answers all of questions and concerns.

Reviewed on Oct 24, 2022

Dr. Kellis is knowledgeable, careful, respectful and diligent with ragards to my condition. I highly recommend her to anyone experiencing thyroid issues.

Reviewed on Oct 24, 2022

Dr. Kellis is the perfect doctor to diagnose and take care of my thyroid condition. My medication is tailored for me not the general public.

Reviewed on Oct 4, 2022

The only difficulty is that this provider is located quite far from me. We have a very good rapport. She has offered to recommend a provider that is closer, but she understands me and is worth the distance I must travel to see her!!!

Reviewed on Sep 21, 2022

Extremely happy with my doctor and with the Cleveland Clinic.

Reviewed on Sep 14, 2022

Dr Kellis is an excellent, caring doctor

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