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Marshall Diven

Marshall Diven, MD

4.832 ratings, 2 reviews

Radiation Oncology

Accepting New Patients
Need help scheduling? Call 406-238-2500

Highlights

Age Groups Seen

  • Adolescent 12-17
  • Adult 18-65
  • Older Adult >65

Languages

  • English

Gender

Male

About Marshall Diven

Marshall Diven, MD, MS, grew up in Hartsville, South Carolina. He went to Wofford College where he majored in Biology and received his undergraduate degree in 2012. He then completed a Masters Degree in Biomedical Sciences with an emphasis in Immunology and Microbiology at the Medical University of South Carolina College of Graduate Studies in Charleston, South Carolina. He obtained his doctorate in medicine at the University of South Carolina School of Medicine Greenville in 2020.  He completed his transitional year program in Rome, Georgia.  He went on to complete a Radiation Oncology residency at NewYork Presbyterian Brooklyn Methodist in collaboration with Weill Cornell Medicine in 2025. He and his wife Kelly enjoy staying active playing golf and going hiking among many other interests.

Locations

  1. Billings Clinic Thoracic Radiation Oncology
    • 801 North 29th Street, Billings Clinic, Billings, MT 59101
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    • Billings Clinic Oncology
      • 801 North 29th Street, Billings Clinic, Billings, MT 59101
      • Get Directions

    Expertise

    Education

    • Residency: New York Presbyterian Methodist Hospital, Radiation Oncology, 2022
    • Internship: AdventHealth Redmond, Transitional, 2021
    • Medical School: University of South Carolina School of Medicine, MD , 2020
    • Graduate: Medical University of South Carolina, MAS, 2015
    • Undergraduate: Wofford College, BS, 2012

    Ratings & Reviews

    4.8 out of 5

    32 ratings, 2 reviews

    At Billings Clinic, our goal is that everyone who walks through our doors will feel informed, heard, and cared for. Patient experience focuses on delivering critical aspects of healthcare such as easy access to information and good communication with health care providers. We monitor patient experience with patient surveys to understand how we are doing, identify opportunities for improvement, and recognize exceptional care and team members. The patient experience rating is an average of all responses to the care provider related questions shown below.

      5 out of 5 stars
      Reviewed on 1/30/2026

      Dr. Diven is an excellent care provider and has taken the time to contact me after every visit. Also the support team was awesome. Keep up the great work!

      5 out of 5 stars
      Reviewed on 1/6/2026

      Dr. Diven and team explained very well treatment and procedure.