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Lillian DeCosimo, MD

Lillian DeCosimo, MD

Inova Medical Group

Board Certified Specialty: Obstetrics and Gynecology

Accepting new patients for: Obstetrics and Gynecology

Gender: Female

Languages: English

Physician Group

Inova Medical Group - Dulles South

Hospital Affiliations


Dr. Lillian DeCosimo is a board certified obstetrics and gynecology physician. She joins Inova Medical Group with over 15 years of clinical experience and extensive experience in minimally invasive gynecological surgical procedures. Dr. DeCosimo’s special interests also include Urogynecology, Menopausal Medicine, Adolescent Gynecology and Chronic Pelvic Pain. She has medical licensures in Virginia and Washington, DC and performs her surgical procedures at Inova Fair Oaks Hospital and the Northern Virginia Surgery Center. She also performs many minor surgical procedures in-office.

At a young age, Dr. DeCosimo was always curious about the many secrets of our human life and had wanted to explore the reasons behind these. She volunteered in high school at a Women’s Health Center and Maternity ward and from then on, it was a certainty that her goal was to become a physician. OB/GYN was a specialty that attracted Dr. DeCosimo as it allows for healthcare for women at all stages of her life—from adolescence through menopause and beyond.

Dr. DeCosimo enjoys spending time with her husband and her three children, reading and practicing yoga.


Medical Education:

  • Universidad Mundial Dominican 1986

Board Certification:

  • Obstetrics and Gynecology


  • Providence Hospital Obstetrics and Gynecology 7/1/1992-6/30/1993


  • Providence Hospital 7/1/1993-6/30/1994
  • Washington Hospital Center 7/1/1994-6/30/1996

Disclosure Statement for Online Physician Referral Service

Thank you for accessing the Inova Physician Referral Service. Please make note of the following information.

This referral service is sponsored by Inova. Only physicians with appropriate medical staff privileges at an Inova affiliated hospital may participate. There is no charge or fee to you or for the participating physician for our service. Physician participation is voluntary.

Physician referrals will be based on your referral needs and preferences of location, specialty, and rotation availability of the physician.

The physicians on our referral panel are independent practitioners or physician employees. The independent practitioners are not employees, agents or representatives of Inova and are solely responsible for their provision of medical care to you.