3.9
46 Ratings with 20 written Reviews

Overview based on verified provider data
![]() | ![]() | ![]() | ![]() |
| Dr. John Willis Marcus, MD | Gina M. Mantia-Smaldone | Dr. Reena Parikh, MD | Dr. Silvana E. Ribaudo, MD |
| Obstetrics & Gynecology | Obstetrics & Gynecology | Obstetrics & Gynecology | Obstetrics & Gynecology |
| Accepts New Patients | Accepts New Patients | ||
| 37 Years of Experience | 22 Years of Experience | 10 Years of Experience | 27 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available |
| Speaks English | Speaks English | Speaks Spanish, Italian | |
| Parsippany , NJ | Philadelphia , PA | New York , NY | New York , NY |
| Med School: University Of Illinois College Of Medicine | Med School: The School Of Medicine At Stony Brook University Medical Center | Med School: Drexel University College Of Medicine | Med School: Warren Alpert Medical School Of Brown University |
Current Profile | View Profile | View Profile | View Profile |
Dr. John Willis Marcus holds an expired medical license in the states of North Carolina, Georgia, and Florida.
Medical Doctor with an expired medical license in the state of North Carolina that expired in 2026, an expired medical license in the state of Georgia that expired in 2026, and an expired medical license in the state of Florida that expired in 2026.
Completed their residency at St Vincents Hospital.
Graduated from University Of Illinois College Of Medicine in 1993 and University Of Illinois At Chicago College Of Medicine in 1989.
Dr. Marcus' NPI number is 1013075951.










Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.