Language

GRAND OPENING! Our newly expanded Fauquier location is now open. All Fauquier appointments will take place at our new location here.  Read an important notice regarding the data security incident McKesson reported on August 28, 2026. Read more.  

Explore Upcoming Patient Events – Find events that are right for you and RSVP soon to reserve your spot!

Select Language
Careers
Main Number: 571.350.8400
Clinical Trials: 703.636.1473
New Patient
Refer a Patient
Virginia Cancer Specialists logo

Robert L. Marsh, MD

Medical Oncologist

Robert L. Marsh, MD

Robert L. Marsh, MD

Board Certifications

Medical Oncology, Hematology, Internal Medicine, and National Medical Examiner

Special Interests

Benign and Malignant Hematology; Genitourinary Medical Oncology; Gynecologic Medical Oncology

Patient Reviews
4.95 out of 5150 Reviews
  • Accepting New Patients
Schedule an Appointment
Share
  • Credentials
Fellowship

University of Florida College of Medicine, Medical Oncology and Hematology

Internship

University of Florida College of Medicine

Medical School

University of Illinois Medical Center

Residency

University of Florida College of Medicine

College

University of Illinois

  • Locations
Bristow
Fauquier
  • Bristow
Learn More
Image For Anmol Singh, MD
Address
9450 Innovation Drive
Manassas, VA 20110
Hours
Monday through Friday
8:30 a.m. to 5:00 p.m.
Phone
571.350.8400
  • Fauquier
Learn More
Fauquier Virginia Cancer Specialists Office
Address
410 Rosedale Court, Suite 270
Warrenton, VA 20186
Hours
Monday through Friday
8:30 a.m. to 5:00 p.m.
Phone
571.350.8400
quote

Modern progress and therapeutics continuously inspire me; how much more can be offered to our patients. I am honored daily to earn my patients trust, while offering my very best - I will always treat them with the importance and respect they deserve.

— Robert L. Marsh, MD

Awards

Castle Connolly – 3 Years of Excellence – 2026
Northern Virginia Magazine Top Doctor – 2026
Northern Virginia Magazine Top Doctor – 2025
Castle Connolly #1 Physician Practice – 2025
Castle Connolly Top Doctor 2024 – 2024
Northern Virginia Magazine Top Doctor – 2024
Washingtonian Magazine Top Doctor – 2023
Northern Virginia Magazine Top Doctor – 2023
Washingtonian Magazine Top Doctor – 2022
Northern Virginia Magazine Top Doctor – 2022
Northern Virginia Magazine Top Doctor – 2021
Northern Virginia Magazine Top Doctor – 2020
Northern Virginia Magazine Top Doctor – 2019
Northern Virginia Magazine Top Doctor – 2018

Dr. Marsh received his doctorate of medicine from the University of Illinois Medical Center and completed his internship, residency and fellowship at the University of Florida College of Medicine, Gainesville, where he was honored with the National Service Award, National Institutes of Health.

Dr. Marsh is a published author and has been a principal research investigator for several cancer related drug studies. During his spare time, he is a Volunteer Trainer for the Prince William County 4-H Bull’s-Eye Shooting Sports Club.

Recent News

More News
Portrait of David Weintritt, MD, FACS
February 5, 2026
Multiple physicians

For the Third Consecutive Year, Virginia Cancer Specialists Named #1 Practice in Virginia for Cancer Care, and Ranked #1 Across All Medical Specialties

FAIRFAX, Va., February 5, 2026/PRNewswire/ — Virginia Cancer Specialists, a trusted leader in community-based cancer care in Northern Virginia for more than 50 years, has been recognized for the third year running as the #1 physician practice in Virginia for cancer care and the #1 physician practice across all medical...

Continue Reading
Portrait of Harold C. Agbahiwe, MD
January 28, 2026
Multiple physicians

32 Virginia Cancer Specialists Physicians Named Among NorthernVirginia Magazine’s 2026 Top Doctors for Excellence in Personalized Cancer Care

Nominated by their medical peers, 32 physicians from Virginia Cancer Specialists were honored as NorthernVirginia magazine’s 2026 Top Doctor honorees. FAIRFAX, Va., January 28, 2026 /PRNewswire/ — Virginia Cancer Specialists, the largest private cancer practice in Northern Virginia, proudly announced today that 32 of its physicians have been recognized as...

Continue Reading
Virginia Cancer Specialists – 1
February 25, 2025
Multiple physicians

Virginia Cancer Specialists Named #1 Physician Practice for Cancer Care, and #1 across All Medical Specialties in Virginia, by Castle Connolly, 2025

For the second year running, Virginia Cancer Specialists was named #1 practice in Virginia for having more Castle Connolly top doctors in cancer care and any other medical specialty than any other physician practice in Virginia, in 2025. Castle Connolly top doctors represent the top 7% of all 850,000 U.S....

Continue Reading

What Patients Say

Ready to Make an Appointment?

If you have questions about whether this treatment or service may be right for you, make an appointment with the Virginia Cancer Specialists team.

Make an Appointment
Find a Physician
View Locations