About Us

Vineland Gynecology Associates (VGA) offers an exemplary tradition of women’s care based on extensive medical experience coupled with advanced techniques and treatments that produce positive results. They are supported by a dedicated and knowledgeable staff in a fresh, new office setting.

The board-certified doctors of VGA, Ronald Portadin, MD and Jonathan Gewirtz, MD, originally of Vineland Obstetrical and Gynecological Professional Association (VOGPA), specialize in providing personalized care.

Together with Nurse Practitioners Cindy Nevara and Rita Vastano, VGA brings outstanding women’s health care to 1318 S. Main Road in Vineland.

Ronald Portadin, MD, FACOG, FACS
Dr. Portadin is a member of the American College of Obstetricians and Gynecologists and the American College of Surgeons and specializes in major gynecological surgery and non-invasive gynecologic surgery, including laser surgery and cancer screenings.



Jonathan Gewirtz, MD, FACOG
Dr. Gewirtz is a member of the American College of Obstetricians and Gynecologists and the New Jersey Medical Society and focuses on Bio-Identical Hormone Replacement therapies and Integrative Medicine (Alternative Medicine) and in-office ablation. Dr. Gewirtz is the South Jersey coordinator of LUNAFEST, a film festival featuring works for and about women. Proceeds from the festival are donated to the Breast Cancer Fund.


Cindy Nevara, NP
Ms. Nevara specializes in gynecological treatment of adolescent and young adults, pre- and post-operative measures, prescriptions, counciling for family planning and contraception, and genetic (hereditary) BRCA testing for breast and ovarian cancer.



Lynda Adamson-Stiles, RN, MSN, APN, C

Lynda has over 30 years of experience in healthcare for women and adolescents, contraceptive counselling, bio-identical hormone replacement and office procedures. Her passion for wellness lead her to becoming a Certified Health Coach who provides weight loss and wellness counseling.