Our Physicians
Thomas Alfreda, Jr., MBA, DO

Dr. Alfreda, an esteemed graduate of Lake Erie College of Osteopathic Medicine, has a loyal following of patients because of his warm and authentic style. Dr. Alfreda focuses on wellness and preventing illness, but is adept at treating chronic and acute disease. In his free time, he serves as medical director for Nathan Adelson Hospice, team physician to the Outlaws arena football team, and is the devoted father of an delightfully precocious tween daughter. And, if he looks familiar, it's only because he's frequently on the news talking about health and was recently on Dr. Oz as one of the nation's most eligible bachelors.

Gary Grossman, MD

Dr. Grossman is a long-time resident of Nevada and graduated with honors from the University of Nevada School of Medicine.  Dr. Grossman's meticulous and thorough style has resulted in a respected reputation amongst his peers and the gratitude of countless patients. While he works long hours to ensure his patient's well-being, he makes sure he attends his sons' lacrosse games. One of Dr. Grossman's guilty pleasures is eating pizza and watching re-runs of Seinfeld.  

Babak Ghadishah, DO

Dr. Ghadishah earned two undergraduate degrees magna cum laude from UCLA, then went on to complete medical school at Touro University. He believes the best part of his profession is helping people feel better and he works hard to ensure good health for all his patients. Dr. Ghadishah is also a talented pianist and the married father of two young—and very loved—children. 

David H. Rosenstein, MD

Dr. Rosenstein is an esteemed graduate of Boston University School of Medicine. After many years exclusively as a hospitalist, Dr. Rosenstein is pleased to also see patients in his office. Dr. Rosenstein is very active in medical education and served as Assistant Professor of Medicine for the University of Nevada School of Medicine and is also an Adjunct Assistant Professor of Internal Medicine for Touro University. Dr. Rosenstein enjoys practicing addiction medicine and helps his patients with Suboxone for opioid addiction. A single father with one child, he and his family enjoy camping and travel. 

Robert Whipple, MD

Dr. Whipple, a retired B-52 bomber navigator, attended the University of Nevada School of Medicine and brings the same insightful skills he utilized in the USAF. His no-nonsense style is tempered by true compassion for the individual he's treating, using both western and nutritional approaches to healing. Dr. Whipple is married with grown children. When he's not at the office, you will likely find him and his new bride redecorating their home or jogging on Lone Mountain with one of their beloved German Shepherd dogs.  

Our Practice


Remember when the doctor remembered your name or spent time with you? Well, now it's time to reacquaint you to the heart of healing with Internal Medicine Specialists of Southern Nevada. Our full-service medical practice is devoted to treating acute and chronic conditions as well as focusing on the most important element in the health equation: You!


Internal Medicine Specialists has earned a respected reputation from colleagues and patients for providing exceptional internal medicine services. Owned and operated by the physicians—each with a unique style—the philosophy that wellness is the way to well-being is collectively embraced. The IMS team delivers comprehensive care including weight management, dietary counsel and stress reduction, as well as treating chronic conditions like heart disease, diabetes, hypertension and cancer. With most insurance accepted as well as on-site x-ray, cardiac testing, labs and ultrasound, IMS priotizes your convenience.  IMS also understands that many delay medical care because of lack of insurance; that's why there are cash pay programs available.  IMS is poised and prepared to provide you exceptional internal medicine services. Be happy. Be healthy. Be well.


Our Practice Administrator
Dee Kennedy

Dee Kennedy accepted the role of Practice Administrator for Internal Medicine Specialists  in late 2013, but she has been instrumental in the success of the practice long before that date. 
Mrs. Kennedy formerly served as the Operations Manager for a medical billing company. Her talent and tenacity catalyzed her transition from billing company management to managing a thriving medical practice. Kennedy's vision is to make Internal Medicine Specialists better prepared to serve patients by embracing technology and putting the patient first.
Growing up in California, Kennedy moved to Nevada in the late 70s. Her first job was in the emergency department of St. Mary's Hospital in Reno and it was during this time that she fell in love with medicine.
In her free time, Dee is not only a devoted wife and mother but grandmother. She and her husband enjoy traveling, fine dining, a good vodka martini, and visiting their beloved grandchildren.