Guy Mulligan, MD
Primary Location
Twinsburg Family Health & Surgery Center
- Appointment:
- 330.888.4000
- Desk:
- 330.888.4000
- Fax:
- 330.888.4350
Additional Locations
Endocrinology, Diabetes and Metabolism
Marymount Hospital
12300 McCracken Road
Garfield Heights, OH 44125
Directions
- Appointment:
- 330.888.4000
- Desk:
- 330.888.4000
- Fax:
- 330.888.4350
Treatment & Services
- Blood Tests
- Bone Density Testing
- Diabetes Care and Treatment
- Fine Needle Aspiration
- General Endocrinology
- Medical Weight Management
- Radioactive Iodine Treatment
- Thyroid Aspiration
- Thyroid Ultrasound and Biopsy
Specialty in Diseases & Conditions
- Adrenal Insufficiency
- Androgen Deficiency (Low Testosterone)
- Androgen Excess
- Calcium Disorders
- Cushing's Syndrome
- Diabetes
- Empty Sella
- Endocrine Disorders
- Fasting Hypoglycemia
- Flushing Syndromes
- Galactorrhea
- Goiter
- Gynecomastia
- Hair Loss in Women
- High Cholesterol
- Hirsutism
- Hyperaldosteronism
- Hyperandrogenism
- Hypercalcemia
- Hyperparathyroidism
- Hyperprolactinemia
- Hyperthyroidism
- Hypertriglyceridemia
- Hypogonadism
- Hypopituitarism
- Hypothyroidism
- Klinefelter Syndrome
- Metabolic Syndrome
- Panhypopituitarism
- Parathyroid Disease
- Pituitary Cysts
- Pituitary Disorders
- Pituitary Stalk Lesions
- Pituitary Tumors
- Polycystic Ovary Syndrome
- Primary Hyperaldosteronism
- Prolactin Excess States
- Prolactinoma
- Reactive Hypoglycemia
- Secondary Hyperparathyroidism
- Thyroid and Pregnancy
- Thyroid Cancer
- Thyroid Disease
- Thyroid Nodule
- Vitamin D Deficiency
Insurance
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View All PlansAbout Guy Mulligan, MD
Education & Professional Highlights
Appointed
2010
Education & Fellowships
Fellowship - Cleveland Clinic
Endocrinology
Cleveland,
OH
2010
Residency - University of Michigan Health System
Internal Medicine
Ann Arbor,
MI
2008
Medical Education - University of Toledo College of Medicine
Toledo,
OH
2005
Undergraduate - College of Wooster
Wooster,
OH
2001
Certifications
- Internal Medicine
- Internal Medicine - Endocrinology, Diabetes and Metabolism
Specialty Interests
Type 2 diabetes mellitus, insulin resistance/pre-diabetes/PCOS, hyperthyroidism, thyroid nodules, primary hyperparathyroidism, hypothyroidism in pregnancy, male hypogonadism, pituitary adenoma, hyperprolactinemia, osteoporosis
Research & Publications
See publications for Guy Mulligan, 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
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 5/27/2024, Dr. Mulligan 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.
407 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 | |
---|---|---|
Explains | 4.9 | |
Listens | 5 | |
Courtesy, Respect & Concern | 4.9 | |
Patient Rating of Doctor | 4.9 |
112 Patient Comments
© 2025 The Cleveland Clinic Foundation. All Rights Reserved. No part of this work may be altered, reproduced, stored in a retrieval system, or transmitted, in any form, by any means, whether electronic, mechanical, by photocopying, recording, or otherwise, without the prior written permission of the Cleveland Clinic.
Reviewed on Jan 16, 2025
Dr. Mulligan really listens and included me in decision making. A++
Reviewed on Jan 16, 2025
Dr. Mulligan was very clear with explanations that were not understood and provided clear and concise answers for clear understanding. I appreciated his patience for my concerns. Thank you for your time.
Reviewed on Jan 15, 2025
Dr Mulligan looks at all factors affecting my health. He noted that the diuretic in my Lisinopril and my use of OTC Unisom sleep aid could be adversely affecting my blood work. He notified my primary care physician and she modified my Lisinopril.
Reviewed on Jan 9, 2025
Dr. Mulligan is very professional ,he explains everything to you clearly. He made sure I had a a clear understanding ding of what is going on.
Reviewed on Jan 7, 2025
Dr. Mulligan and his staff are the true example of CCF being World Class Health Care Providers!
Reviewed on Jan 7, 2025
Dr. Mulligan is the best!
Reviewed on Jan 6, 2025
Excellent bedside manner and expertise medical care always! One of my favorite doctors of all time :)
Reviewed on Dec 19, 2024
Dr. Mulligan is always very thorough. I am so happy that I made the switch to change doctors.
Reviewed on Dec 19, 2024
No response from doctor on ultrasound of thyroid and blood work. It is so insulting to take the time to go to doctor and he is not interested enough to even talk to a patient or relay any information about test results or treatment. Doctor does not care about patient. No response regarding ultrasound, blood test, or treatment for thyroid Issues. E
Reviewed on Dec 18, 2024
Dr. Mulligan is WONDERFUL! He is an excellent listener, very patient with me, and understanding. He offered an alternative to something my insurance does not cover. He clearly discussed treatment . I did not feel rushed as he listened to me respond to his questions and ask questions. I wish he could be my primary care physician!
Reviewed on Nov 22, 2024
Dr Mulligan is one of the best doctors at Cleveland Clinic, on every aspect. He listens he responds, he gives you his undivided attention. I wish it wasn't so hard to get an appointment but he's worth the wait.
Reviewed on Nov 20, 2024
First in person visit following a video visit months before. Doctor Mulligan presented with a caring, kind, patient manner. Listened, questioned and provided a path to manage and control my thyroid dysfunction. I am not easily influenced by a physician's demeanor (being a MSRN, for decades. Old nurses can be tough. Dr Mulligan is the best.
Reviewed on Nov 8, 2024
Dr. Mulligan was very easy to talk to.
Reviewed on Nov 7, 2024
The doctor explained very thoroughly what the ultrasound displayed. Listened to my questions.
Reviewed on Oct 31, 2024
Dr Mulligan is a wonderful listener and an excellent physician
Reviewed on Oct 30, 2024
Dr Mulligan is very kind and caring. He listens to concerns. He reviews my test results with me and us very thorough.
Reviewed on Oct 24, 2024
I love Dr. Mulligan. I have been his patient for 14 years and he is an excellent doctor!
Reviewed on Oct 24, 2024
Working with Dr. Mulligan has been an absolute joy whether on a virtual call or in his office. I have loved my experience working with him. He listens and truly cares about any issue you may be having. I have been seeing him for over a year and had my first in office visit and loved getting to meet him in person. I did not have the best experience with the nurse I saw first. She was rude and very invasive about my issues that I felt should have been discussed with Dr. Mulligan. I felt that she went through my chart (on the computer) and did not need to? Otherwise, I absolutely love that I switched my Endocrinologist to Dr. Mulligan!
Reviewed on Oct 24, 2024
Dr Mulligan was great .
Reviewed on Oct 23, 2024
I have already recommended Dr Mulligan
Reviewed on Oct 23, 2024
Dr Mulligan was thorough and caring. Medical care just doesn't get any better.
Reviewed on Oct 23, 2024
I recently moved from Nashville. This was my first DRs visit since returning to my hometown. Dr Mulligan and The Cleveland Clinic was an excellent experience.
Reviewed on Oct 22, 2024
Dr. Mulligan is wonderful, thorough, kind, understanding, he listens and seems to really care
Reviewed on Oct 18, 2024
Dr. Mulligan is thorough and caring. He explains things extremely well and is so personable!
Reviewed on Oct 11, 2024
Dr Mulligan Is very engaged and gives plenty of time.. Plus
Reviewed on Oct 11, 2024
A great Doctor..
Reviewed on Oct 11, 2024
Doctor perfect
Reviewed on Oct 11, 2024
Dr. Mulligan handled some medical concerns and ordered tests when my primary care wouldn't. Very grateful for that. He knew it was important.
Reviewed on Oct 10, 2024
Scheduling was very difficult and many many moths out - after further discussions with Dr. Mulligan office and my issues following open heart surgery they were able to get me a schedule appointment within days which was deeply appreciated. That was great efforts
Reviewed on Oct 9, 2024
Dr Mulligan listens to what I have to say and is very attentive. Seeing results of my blood test quickly and calling in prescriptions for me.
Reviewed on Oct 8, 2024
The doctor was attentive, polite, caring and easy to understand.
Reviewed on Oct 7, 2024
Dr Mulligan is very easy to talk to and listens to whatever I had to say.
Reviewed on Oct 3, 2024
Dr Mulligan was excellent! He explained many things that we weren't very clear on. This adrenal insufficiency, having it 18+ years, still presents symptoms that I don't understand. He explained everything we asked very clearly. We were very impressed.
Reviewed on Oct 3, 2024
I always talk about CCF, since they have given me a life twice. Many of my colleagues have gone to the CCF for surgeries and answers, and thanked me for the information. Everyone has returned with glowing reviews. I now have a friend going to Dr. Mulligan!
Reviewed on Sep 26, 2024
Dr Mulligan is very professional and friendly He always takes time to answer all of my questions completely. I appreciate his Great Care.
Reviewed on Sep 25, 2024
Dr. Mulligan is very thorough and spends a great deal of time going over labs. He listens to all I have to say and genuinely cares how I feel.
Reviewed on Sep 24, 2024
Dr. Mulligan is great!
Reviewed on Sep 23, 2024
Dr. Mulligan was great! Asked very thoughtful questions, listened to our comments and concerns, and was very thorough in his analysis and diagnosis.
Reviewed on Sep 19, 2024
Dr. Mulligan is one of the best doctors I have ever had. He comes in prepared having obviously read my most recent medical info. He explains everything and gets my thoughts on continued treatment.
Reviewed on Sep 17, 2024
I would highly recommend Dr Mulligan concerning insulin-dependent diabetes care, and challenging thyroid situations.
Reviewed on Sep 13, 2024
My first experience with Dr. Mulligan was good, he listened and explained things to me.
Reviewed on Sep 9, 2024
Dr. Mulligan was very thorough with his assessment and recommendations.
Reviewed on Aug 29, 2024
Dr. Mulligan came highly recommended, and fully lived up to what I was hoping for.I would recommend him to anyone who wants a highly caring physician who takes time to understand your concerns and help create solutions.If he provided PCP care, I would seek to gain him on my care team!
Reviewed on Aug 27, 2024
Dr Mulligan is great . Takes the time to explain and is up to speed on new meds available. Great Dr
Reviewed on Aug 26, 2024
Great Doctor!
Reviewed on Aug 23, 2024
Care provider answered any and all of my questions completely
Reviewed on Aug 23, 2024
Dr. Mulligan is popular and it is often tricky to get a timely appointment with him even when he notes he wants one sooner than 6 months out. He has taken to having his nurse call me to schedule which helps.
Reviewed on Aug 23, 2024
My entire family sees Dr. Mulligan and find him compassionate, knowledgeable, and collaborative as a care provider. We are very happy with his care.
Reviewed on Aug 23, 2024
Dr. Mulligan gave a thorough explanation of the treatment of my health issues and thoroughly answered my questions.
Reviewed on Aug 23, 2024
Dr. Mulligan is the best!! He always listens and shows genuine concern.
Reviewed on Aug 20, 2024
Dr. Mulligan is an exceptionally good doctor. He listens and problem solves based on what we discuss.
Reviewed on Aug 16, 2024
I understand that schedules are booked out sometimes longer than when you need to see the doctor but it would be nice if wait times were shorter.
Reviewed on Aug 16, 2024
Dr. Mulligan is always prepared, caring and explains things well. He's very personable and non-intimidating.
Reviewed on Aug 15, 2024
The doctor spent a great deal of time with me. Didn't rush and went over all my blood lab results,
Reviewed on Aug 15, 2024
Dr. Milligan is an outstanding physician who listens, advises, and cares deeply about the health and well-being of his patients.
Reviewed on Jul 23, 2024
Dr.Mulligan is outstanding.
Reviewed on Jul 19, 2024
Dr. Mulligan is a fantastic Doctor. I would recommend him to anyone requiring similar care.
Reviewed on Jul 8, 2024
Since Dr Ahdi Mehta has retired and Dr. Mulligan has had to pick up patients and combine them. He is too busy and it is too hard to get appointments scheduled or to get in touch with him.
Reviewed on Jul 5, 2024
Wonderful experience! Would highly recommend him to others!
Reviewed on Jul 2, 2024
Dr Mulligan was excellent! He explained everything very thoroughly and answered all of my questions. He was worth the lengthy wait!
Reviewed on Jun 20, 2024
Dr Mulligan is terrific!! Very knowledgeable and kind.
Reviewed on Jun 20, 2024
Dr. Mulligan is a wonderful Doctor, so kind and caring.
Reviewed on Jun 12, 2024
Have always had a positive experience with Dr. Mulligans support staff.
Reviewed on Jun 12, 2024
Dr. Mulligan is the best doctor that I have ever worked with at the CCF. He should be the role model for all doctors to follow.
Reviewed on Jun 10, 2024
Dr. Mulligan's performance was stellar as usual. Such a fine person he is.
Reviewed on Jun 7, 2024
Dr Mulligan Shasta takes his time with me as a patient. He's open to questions, and offers feedback as a dialogue.
Reviewed on Jun 6, 2024
Dr. Mulligan and his staff are always very caring and looking out for my best interests with my health. I greatly appreciate it as I have a primary care Doctor Who is always so critical when I go I dread going to the doctor
Reviewed on Jun 4, 2024
Doctor has very large case load; can make it difficult to Get appt
Reviewed on Jun 4, 2024
Dr Mulligan is one of the most compassionate and caring Doctors I have had the pleasure to be a patient of!!
Reviewed on Jun 3, 2024
Dr Mulligan is excellent! He is very knowledgeable and caring. Exceptional person and physician.
Reviewed on May 30, 2024
I love Dr Mulligan I wish he was closer to me but he is worth the drive.
Reviewed on May 30, 2024
He's the best!
Reviewed on May 24, 2024
Dr. Mulligan was very attentive to my needs and ordered proper testing.
Reviewed on May 20, 2024
This physician is very open to discussion and clarifies the plan of care which involves me.
Reviewed on Apr 26, 2024
I was not able to schedule in-person, my preference. The Scheduling Dept resisted. But, my virtual visit with Dr Mulligan was thorough, well-planned, and appreciated. I learned a lot from Dr. Mulligan. He is respectful and knowledgeable and made me feel at ease. Truly appreciated.
Reviewed on Apr 26, 2024
As noted in previous response. Dr Mulligan is knowledgeable, respectful, kind, answered all questions thoroughly and put me at ease. I am quite happy with our visit and learned a lot. Truly appreciative.
Reviewed on Apr 25, 2024
I have had Dr. Mulligan for many years and he is the best. Knowledgeable, professional, easy to talk to, listens to what I have to say and takes my concerns seriously. I am both confident in his ability and appreciative of his man or of communication.
Reviewed on Apr 23, 2024
I'm grateful that my care providers and doctors are in the Cleveland Clinic system.
Reviewed on Apr 22, 2024
Kind and respectful provider. Does not respond to MyChart messaging in a timely manner.
Reviewed on Apr 19, 2024
I can't say enough good things about Dr. Guy Mulligan. As an endocrinologist, he's at the top of the game clinically and provides excellent explanations of what is a complicated area of the body's functions. He is also pleasant, patient, and easy going with patients. I recommend him highly to family and friends who need endocrine care.
Reviewed on Apr 16, 2024
Dr Mulligan is very kind and understanding
Reviewed on Apr 12, 2024
Dr Mulligan always gives his best efforts and attention to my questions and works with me to solve them. Exceptional care!
Reviewed on Apr 8, 2024
Dr. Mulligan was very helpful and considerate in regard to listening to my current physiological symptoms and possible medication dosage changes.
Reviewed on Apr 1, 2024
Overall really like Dr. Mulligan. He really listens. Know he and his peers are busy, but would be great If Drs had more knowledge of current events of meds they are prescribing like Mounjaro.
Reviewed on Apr 1, 2024
Dr Mulligan is always thorough and attentive to my health needs and questions.
Reviewed on Mar 19, 2024
Dr. Mulligan is an excellent doctor. He gave me plenty of time to learn about my concerns and explain his plan of care. I am very pleased to have been referred to him by Dr. Mehta.
Reviewed on Mar 19, 2024
Excellent doctor
Reviewed on Mar 19, 2024
This appt was pure luck. My mother had a terrible time scheduling for the same physician so me being able to get a referral AND book an appt the next day was definitely not the norm.
Reviewed on Mar 19, 2024
Dr. Mulligan is wonderful. I wish there were more endos like him available in the satellite locations across the area.
Reviewed on Mar 18, 2024
Dr Mulligan always answers all of my questions and includes me in the discussion about my treatment and care. I truly appreciate that.
Reviewed on Mar 14, 2024
Awesome doctor. Very educational. Great experience.
Reviewed on Mar 8, 2024
Dr. Mulligan is very kind and caring and took the time to answer all of my questions without me feeling rushed.
Reviewed on Mar 8, 2024
The video visit allowed me to not have to make a 10-hour round trip drive to see Dr. Mulligan.
Reviewed on Mar 8, 2024
Great doctor, I have already recommended him to a friend.
Reviewed on Mar 1, 2024
This doctor is so popular, hard to get an appointment!
Reviewed on Mar 1, 2024
Outstanding care and excellent doctor
Reviewed on Mar 1, 2024
Excellent doctor all around
Reviewed on Feb 9, 2024
DR. Mulligan is one of the best endocrinologists I have seen. Knowledgeable, kind and caring.
Reviewed on Feb 8, 2024
Dr. Mulligan is an excellent doctor.
Reviewed on Feb 8, 2024
Dr. Mulligan was very thorough with his review and recommendations for next steps.
Reviewed on Feb 6, 2024
The Dr was very thorough and responsive to my concerns. He seems like he's a very good endo and is willing to help with my weight and thyroid concerns he's just very busy. The wait time to see him was just horrible and he still hasn't reviewed my labs or responded about them.
Reviewed on Feb 6, 2024
Outstanding doctor! Dr. Mulligan is extremely knowledgeable, a great listener, and a compassionate and caring physician.
Reviewed on Feb 6, 2024
It's very difficult to get into see Dr Mullian
Reviewed on Feb 6, 2024
Dr mulligan is a very good caring doctor!
Reviewed on Feb 6, 2024
My surgeon and Dr mulligan had different opinions. I feel they could have discussed this before my visit
Reviewed on Feb 5, 2024
Dr Mulligan is an excellent people person. Warm and genuinely caring. I'm very happy to have found a Dr like him.
Reviewed on Feb 2, 2024
Dr Mulligan is fantastic and clearly cares about his patients.
Reviewed on Feb 2, 2024
The staff is wonderful but NP visit should cost less than Dr visit.
Reviewed on Feb 1, 2024
Dr. Is very busy so you have to schedule a minimum of 6mo. Out.
Reviewed on Feb 1, 2024
Dr. Mulligan is excellent and caring and gives you plenty of time at your viist
Reviewed on Jan 30, 2024
I am a new patient for Dr Mulligan I was very please he listened to me with my concerns and my questions and helped me manage the best care plan. . I am happy he is my Endocrinologist.
Reviewed on Jan 25, 2024
Excellent doctor