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The Section of Endocrinology at Rush University Medical Center in Chicago, Illinois, offers a full range of services in endocrinology, including outpatient provocative endocrine testing, thyroid biopsy and intensive diabetes management and education.

Endocrinology focuses on glands that secrete hormones, which are chemical messengers that travel throughout the bloodstream to regulate different bodily functions. These glands include the thyroid, parathyroid, pituitary gland, hypothalamus, pancreas, adrenal glands and gonads. Clinical research by our team at Rush has focused on diabetes and care of people with diabetes after organ transplantation.

The diabetes and endocrinology program at Rush was ranked No. 35 in U.S. News & World Report’s 2013-14 America’s Best Hospitals issue.


David Baldwin, Jr., MD, is the Director of Diabetes Care in the Division of Endocrinology within the Department of Internal Medicine and is the Dr. Andrew and Peg Thomson Professor of Internal Medicine at Rush Medical College. He completed medical school at Rush Medical College, his residency at Brigham and Women's Hospital, and his fellowship at the University of Chicago Medical Center. He is board certified in Internal Medicine and Endocrinology, Diabetes, & Metabolism with clinical expertise in acromegaly, adrenal gland cancers, adrenal gland disorders, adrenal insufficiency, diabetes, diabetes insipidus, endocrine disorders, fine-needle aspiration biopsy of thyroid, Graves' disease, Hashimoto's disease, hyperthyroidism, hypoglycemia, hypoparathyroidism, parathyroid disease, pituitary disorders, prolactinoma, thyroid cancer, and thyroid disease.


Tiffany Hor, MD, is an Assistant Professor in the Department of Internal Medicine at Rush Medical College. She completed medical school at the University of Illinois College of Medicine at Chicago, her residency at Rush University Medical Center and her fellowship at Rush University Medical Center/John H. Stroger, Jr. Hospital of Cook County. She is board certified in Internal Medicine and Endocrinology, Diabetes, & Metabolism and has clinical expertise in diabetes, fine-needle aspiration biopsy of thyroid, pituitary disorders, thyroid cancer, thyroid disease, and ultrasound-guided biopsy and aspiration.

Mahtab Sohrevardi, MD, is an Assistant Professor in the Department of Internal Medicine at Rush Medical College. completed medical school at Tehran University School of Medical Sciences in Iran, and her residency and fellowship at the University of Utah Hospital. She is board certified in Internal Medicine (PCP) and has clinical expertise in diabetes, endocrine disorders, hyperparathyroidism, hypoglycemia, metabolic disorders, and thyroid cancer. She is also fluent in Farsi.

Marsha Teodori, RN, received her Master of Science in Nursing from Lewis University.  With over 15 years of nursing experience (disease management, geriatric-psychiatry, biologic infusion, & clinical trials), she provides service through direct patient care, consultation, research, education and collaboration with other health care professionals and other endocrinologists.  Marsha takes into account physiological & psychosocial factors to help patients successfully manage their diabetes, and she provides education and resources in collaboration with other members of the care team.  

Gretchen Witowich, MS, RD, LDN, Diabetes Coordinator, received her Master of Science in Clinical Nutrition from Rush University.  As a Registered Dietician and Diabetes Educator, Gretchen works closely with nurses, physicians and office staff to help patients learn about and manage their Diabetes.  A day can include menu planning for pregnant women with diabetes, insulin injection teaching, blood glucose monitor teaching, insulin pump starts, and more.  Due to her background in nutrition, Gretchen focuses heavily on diet and helping patients understand the impact it has on their condition.  She strives to help her patients fully understand their diabetes in order to prevent complications and maintain an optimal quality of life.  ​

We provide diagnosis and care for the following disorders:

  • Addison’s disease
  • Adrenal disease
  • Cushing syndrome
  • Diabetes insipidus
  • Endocrine hypertension
  • Gonadal disorders
  • Hypercalcemia
  • Hypocalcemia
  • Lipid disorders
  • Osteoporosis
  • Parathyroid disorders
  • Pituitary disease
  • Polycystic ovary syndrome (PCOS)
  • Thyroid cancer
  • Thyroid disease
    • Hyperthyroid (overactive thyroid)
    • Graves' disease
    • Hypothyroid (underactive thyroid)
  • Thyroid nodules
  • Type 1 diabetes
  • Type 2 diabetes



Accreditation and Recognition

Consultants in Endocrinology
1725 W. Harrison St.
Professional Building II
Suite 250
Chicago, IL 60612
Phone: (312) 942-6163
Fax: (312) 563-2096
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