About
Colby H. Grossman, MD, FACP has practiced internal medicine in Summerville, South Carolina for more than 35 years. He earned his Bachelor of Science in Biology, Magna Cum Laude, from the University of South Carolina in 1979. He then completed his Doctorate of Medicine at the Medical University of South Carolina in 1983. His internship and internal medicine residency both took place at Greenville Memorial Hospital, finishing in 1987.
Dr. Grossman holds board certification as a Diplomate of the American Board of Internal Medicine and serves as a Fellow of the American College of Physicians. He founded Palmetto Clinical Research in 1992, focusing his research on hypertension, diabetes, hypercholesterolemia, and cardiovascular disease prevention. He has served as Chief of Medicine and Chief of Staff at Trident Regional Medical Center, and he has held the role of Medical Director of Patient Centered Medical Homes since 2013. His honors include the Top Internist Award in 2021, America's Top Physician Award in 2012, and multiple NCQA Certificates of Recognition for diabetes and heart disease. Dr. Grossman is passionate about nutrition, healthy living, and managing complex medical problems with careful attention to detail. Many of his patients have trusted him with their care for 25 to 30 years.
Education & Training
Undergraduate
University of South Carolina, B.S. Biology, Magna Cum Laude, 1979
Medical School
Medical University of South Carolina, Doctorate of Medicine, 1983
Residency
Internal Medicine, Greenville Memorial Hospital, Greenville, SC, 1984-1987
Additional Training
Internship: Greenville Memorial Hospital, Greenville, SC, 1983-1984
Certifications
Conditions Treated
Who is Dr. Grossman right for?
Dr. Grossman is a strong fit for adults who want a physician focused on preventing illness before it starts. Patients managing hypertension, diabetes, high cholesterol, or cardiovascular disease benefit directly from his research background in those conditions. He works well with patients who have complex or overlapping medical problems requiring close attention. Adults who value a long-term relationship with a single physician will find that many of his patients have stayed with him for decades.
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Frequently Asked Questions
Dr. Grossman specializes in hypertension, diabetes, hypercholesterolemia, and cardiovascular disease prevention. He also manages coronary artery disease, complex medical problems, and general internal medicine conditions. His research work through Palmetto Clinical Research has kept him at the forefront of treatment strategies in these areas for over three decades.
Yes. Dr. Grossman holds board certification as a Diplomate of the American Board of Internal Medicine. He also serves as a Fellow of the American College of Physicians, a distinction reflecting his sustained contributions to the field.
Dr. Grossman earned his medical degree from the Medical University of South Carolina in 1983. He completed both his internship and his internal medicine residency at Greenville Memorial Hospital in Greenville, SC, finishing his residency in 1987.
Dr. Grossman prioritizes preventing illness over treating it after the fact. He brings careful attention to detail to every appointment, which he considers essential for patients with complex medical problems. His approach integrates nutrition, healthy living, and a research-informed view of chronic disease management.
Dr. Grossman has earned several honors over his career. These include the Top Internist Award in 2021, America's Top Physician Award in 2012, and NCQA Certificates of Recognition for diabetes and heart disease and stroke from 2010 to 2013. He also received Oquin Outpatient Quality Network Improvement Awards for heart and diabetes care and for coronary artery disease in 2012.
Yes. Dr. Grossman is reachable by phone after hours and on weekends. Members consistently highlight his availability during evenings, weekends, and even while they travel as one of the most valued aspects of his practice.
Dr. Grossman founded Palmetto Clinical Research in 1992. His research focused on hypertension, diabetes, hypercholesterolemia, and cardiovascular disease prevention. He applies that research experience directly to patient care, using current treatment strategies to support healthier outcomes.
Dr. Grossman sees adult patients, with a particular focus on those managing chronic conditions like high blood pressure, diabetes, and heart disease. He also works with patients who prioritize preventive care and want a physician who engages with their overall wellness, nutrition, and long-term health goals.
Doctor profile last updated April 4, 2026