About
Gregg Marella, MD, earned his BS in Biology cum laude from the University of Scranton, where he also studied English and Philosophy. He received his medical degree from Pennsylvania State University Milton S. Hershey College of Medicine. He completed his Internal Medicine residency at Morristown Medical Center, earning selection as Chief Resident and later serving as Section Head of Internal Medicine.
Dr. Marella holds board certification in Internal Medicine and brings a strong passion for sports medicine to his practice. For more than a decade, he served as team physician for both the New Jersey Nets and the New York Red Bulls. He currently serves as Director of Medical Education at Care One Nursing Facility in Whippany and as Medical Director of Holly Manor Nursing Home in Mendham. Outside medicine, Dr. Marella coaches his sons and treasures time with his four children.
Education & Training
Undergraduate
University of Scranton, BS in Biology, cum laude
Medical School
Pennsylvania State University Milton S. Hershey College of Medicine, MD
Residency
Internal Medicine, Morristown Medical Center (Chief Resident)
Additional Training
Section Head of Internal Medicine, Morristown Medical Center; Director of Medical Education, Care One Nursing Facility; Medical Director, Holly Manor Nursing Home
Certifications
Conditions Treated
Who is Dr. Marella right for?
Dr. Marella is a strong fit for patients thirteen and older seeking a physician with deep clinical experience. Adults managing chronic conditions benefit from his internal medicine background and decades of practice. Athletes and active patients find particular value in his sports medicine expertise. Patients who want a physician available around the clock, including house calls, will feel well supported here.
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Frequently Asked Questions
Dr. Marella treats a broad range of conditions under internal medicine and sports medicine. This includes chronic illness management, preventive care, and musculoskeletal and sports-related injuries. His four-decade career gives him extensive experience across a wide spectrum of adult and adolescent health concerns.
Yes, Dr. Marella holds board certification in Internal Medicine. He earned his medical degree from Pennsylvania State University Milton S. Hershey College of Medicine and completed his residency at Morristown Medical Center, where he was selected as Chief Resident.
Dr. Marella developed deep expertise in sports medicine throughout his career. He served as team physician for both the New Jersey Nets and the New York Red Bulls for more than a decade. He applies that same sports medicine knowledge to patients at Mendham Medical.
Dr. Marella has served the Mendham, NJ community for more than four decades. That longevity reflects both his commitment to the area and the long-term relationships he builds with his patients.
Dr. Marella welcomes patients ages thirteen and older. His internal medicine and sports medicine background allows him to address the health needs of adolescents through older adults.
Yes, Dr. Marella offers house calls for his patients. This is part of the concierge model at Mendham Medical, which also includes 24/7 availability for members.
Dr. Marella earned his undergraduate degree cum laude from the University of Scranton and his medical degree from Pennsylvania State University Milton S. Hershey College of Medicine. He completed his Internal Medicine residency at Morristown Medical Center, earning selection as Chief Resident.
Yes, Dr. Marella currently serves as Director of Medical Education at Care One Nursing Facility in Whippany. He also serves as Medical Director of Holly Manor Nursing Home in Mendham. These roles reflect his commitment to education and community-based care.
Doctor profile last updated March 21, 2026