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Department Endocrinology, Diabetes and Metabolism
Primary Location Cleveland Clinic Main Campus
Type of Doctor Both Adults and Children & Adolescents
Languages English
Surgeon No
Locations
Cleveland Clinic Main Campus
Primary Location

Cleveland Clinic Main Campus

Appointment:
216.444.6568
Desk:
216.444.9428
Fax:
216.444.3474

Additional Locations

Specialties & Treatments

Treatment & Services

  • Adolescent Endocrinology
  • Diabetes Center
  • General Endocrinology
  • Medical Weight Management
  • Radioactive Iodine Treatment
  • Thyroid Aspiration
  • Thyroid Ultrasound
  • Thyroid Ultrasound And Biopsy
View all 8 Treatment & Services +

Specialty in Diseases & Conditions

  • Acromegaly
  • Addison's Disease
  • Adrenal disorders
  • Adrenal insufficiency
  • Adrenal Tumors
  • Adrenocortical Carcinoma
  • Adrenoleukodystrophy (ALD)
  • Alopecia Areata
  • Amenorrhea
  • Androgen Deficiency (Low Testosterone)
  • Androgen Excess
  • Beta-cell disorders
  • Bone Disorders
  • Calcium Disorders
  • Carcinoid Syndrome
  • Cardiovascular Risk Prevention
  • Conn's Syndrome
  • Cushing's Syndrome
  • Diabetes
  • Diabetes, Gestational
  • Erectile Dysfunction
  • Familial Multiple Endocrine Neoplasia
  • Fasting hypoglycemia
  • Flushing Syndromes
  • Galactorrhea
  • Goiter
  • Growth hormone deficiency
  • Growth hormone excess
  • Gynecomastia
  • Hair Loss
  • Hair Loss in Women
  • High Cholesterol
  • Hirsutism
  • Hyperaldosteronism
  • Hyperandrogenism
  • Hypercalcemia
  • Hyperprolactinemia
  • Hypertension - High Blood Pressure
  • Hyperthyroidism
  • Hypertriglyceridemia
  • Hypocalcemia
  • Hypogonadism
  • Hypoparathyroidism
  • Hypophysitis
  • Hypopituitarism
  • Hypothyroidism
  • Ketogenic Diet
  • Klinefelter Syndrome
  • Male Infertility Testing
  • Menopause, Male
  • Metabolic Diseases
  • Metabolic Syndrome
  • Neuropathy - Diabetic
  • Obesity
  • Osteopenia
  • Osteoporosis
  • Panhypopituitarism
  • Parathyroid Disease Description
  • Pheochromocytoma
  • Pituitary Disorders
  • Pituitary Tumors
  • Polycystic Ovary Syndrome
  • Primary Hyperaldosteronism
  • Prolactin Excess States
  • Prolactinoma
  • Pseudohypoparathyroidism
  • Reactive hypoglycemia
  • Secondary Hyperparathyroidism
  • Sexual Dysfunction
  • Sexual Hormone disorders
  • Tertiary hyperparathyroidism
  • Thyroid and pregnancy
  • Thyroid Cancer
  • Thyroid Disease
  • Thyroid Nodule
  • Vitamin D Deficiency
View all 76 Specialties +
Insurance

Insurance

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Education & Professional Highlights

Education & Professional Highlights

Appointed
2001

Education & Fellowships

Fellowship - Mayo Clinic
Endocrinology
Rochester, MN USA
1987

Residency - Duke University Medical Center
Internal Medicine
Durham, NC USA
1984

Internship - Duke University Medical Center
Internal Medicine
Durham, NC USA
1982

Medical Education - Johns Hopkins University School of Medicine
Baltimore, MD USA
1981

Undergraduate - University of Michigan
Ann Arbor, MI USA
1977

Certifications

  • Internal Medicine
  • Internal Medicine - Endocrinology, Diabetes and Metabolism

Specialty Interests

Type I and Type II diabetes, adult growth hormone deficiency, hypothyroidism, hyperthyroidism, thyroid nodule, hypogonadism, pituitary adenoma, adrenal insufficiency, hypercalcemia

Research & Publications

Research & Publications

See publications for Robert Zimmerman, 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 11/18/2021, Dr. Zimmerman 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

145 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

21 Patient Comments

Reviewed on Aug 30, 2022

Dr. Zimmerman is an excellent physician. But the app to connect for virtual visit does not always work.

Reviewed on Aug 23, 2022

Dr Zimmerman is always very thorough!!

Reviewed on Aug 1, 2022

Outside of scheduling I did not try to reach anyone in this clinic, so 3 & 5 do not really apply. I had to wait longer than I preferred for this appointment. I will wait for Dr. Zimmerman because I want to continue working with him.

Reviewed on Jun 15, 2022

I feel very comfortable with Dr Zimmerman and staff

Reviewed on Jun 10, 2022

I think Dr. ZImmerman went above and beyond in providing care. He is willing to think creatively.

Reviewed on Jun 10, 2022

Dr. Zimmerman is incredibly sincere & really enthusiastic about solving medical problems for the patient. I referred my sister who is also quickly seeing how his level of service stands out from all Endocronologists. I'm so grateful to have Dr. Zimmerman as the center of my medical care.

Reviewed on May 4, 2022

Dr. Zimmerman was very knowledgeable about my concerns. Gave us possible reasons and treatments to change to make this process easier. I hope to follow up with him at a later date.

Reviewed on May 2, 2022

Delighted to have Dr. Robert Zimmerman as my endocrinologist. A credit to the Cleveland Clinic.

Reviewed on Mar 11, 2022

Dr. Zimmerman is excellent.

Reviewed on Feb 9, 2022

I have been coming to Dr Zimmerman for 19 years. I feel very comfortable with him and everyone in the dept.

Reviewed on Jan 10, 2022

Lady that assisted Dr Zimmerman with biopsy was very caring. Dont remember her name.

Reviewed on Jan 10, 2022

Dr.Zimmerman is a excellent Doctor and has been my doctor for years.

Reviewed on Dec 10, 2021

Dr. Zimmerman has been with me since the beginning of my thyroid problem. He is GOOD. Kept adjusting medication until my thyroid started functioning properly.

Reviewed on Dec 7, 2021

Good visit. The doctor took his time to explain things

Reviewed on Dec 6, 2021

Dr. Z us always thorough.

Reviewed on Nov 22, 2021

I have been a patient of Dr . Zimmerman's for many years and I have been well taken care of. I have the utmost confidence in him.

Reviewed on Nov 8, 2021

I had a great visit with Dr. Zimmerman and his staff.

Reviewed on Sep 24, 2021

All good. Dr. Zimmerman is a great asset to the Clinic!

Reviewed on Sep 22, 2021

Dr Z has always been very attentive and demonstrated a realness about my concerns. He is always very thorough. He found medication that worked for my diabetes after I had become so frustrated with the efforts of my primary care physician.

Reviewed on Sep 20, 2021

Dr. Zimmerman took all the time needed to address the issue including doing a biopsy right there at the appointment - not making me wait nor return for an additional appointment. He listened. He answered my questions. He promptly called me with results and path forward info. He reassured me regarding all possible outcomes.

Reviewed on Sep 17, 2021

Dr. Zimmerman is very personable and I enjoy being his patient.

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