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Cindy O. Scharfen, MD
Practice accepting new patients.

Cindy O. Scharfen, MD

(707) 763-0600
Primary Specialties
  • Radiation Oncology
Medical Groups & Affiliations
  • St. Joseph Health Medical Group

Primary Office

Medical and Radiation Oncology - Petaluma
110 Lynch Creek Way
Suite A
Petaluma, CA 94954
(707) 763-0600
(707) 765-1757
Mon - Fri 9 a.m. - 5 p.m.
Web Page:

Secondary Office

Medical and Radiation Oncology - Santa Rosa
3555 Round Barn Circle
Santa Rosa, CA 95403
(707) 528-1050
(707) 525-3874

Physician Bio

Dr. Cindy Scharfen graduated from Pomona College with a degree in Chemistry. She received her medical degree from University of California at San Francisco Medical School.

Dr. Scharfen’s residency was in Radiation Oncology at the University of California at San Francisco. During this time she spent a year in research publishing papers on Glioblastoma Multiforme. After her residency, she helped set up the San Diego Gamma Knife Center, for treatment of brain tumors.

Dr. Scharfen has been in private practice with Redwood Regional Medical Group since 1995. She has been active in the Santa Rosa Memorial Hospital Investigational Review Board and clinical trials for many years. She has been very active in the Redwood Regional Medical Group Breast Tumor Board and Sutter Breast Tumor Board.


  • Medical School:
    University of California San Francisco - San Francisco, CA
  • Internship:
    Mt. Zion Hospital
  • Residency:
    University of California San Francisco - San Francisco, CA
  • Board Certified in Radiation Oncology


American Society of Therapeutic Radiology and Oncology
California Medical Association
Sonoma County Medical Society
Northern California Radiation Oncology Society


Phi Beta Kappa, 1984 UCSF School of Medicine Regents Scholar (Full Academic Scholarship), 1984-1988 American Cancer Society Clinical Oncology Fellowship Grant, 1990-1991