William V. Harrer III, MD

William V. Harrer III, MD


Languages Spoken

  • English

After beginning his career in the Northeast, Dr. Harrer practiced in Brunswick and Thomasville, GA, where he served as the Director of Medical Oncology and the Medical Director of Hospice at the Lewis Hall Singletary Oncology Center until 2001. He relocated to Citrus County, FL in 2002 and currently practices in both Crystal River and Inverness, FL. Dr. Harrer was named Chief of Staff at Citrus Memorial Hospital and also President of the Citrus County Medical Society in 2002 and maintains both positions currently. He also provides physician leadership at Seven Rivers Community Hospital in Crystal River, FL. Dr. Harrer is active in clinical research and, from 2001 to present day, he has served as Chief Investigator for Research Protocols at Nature Coast Clinical Research in Jacksonville, FL.

Manuel Carvalho Testimonial - Dr. William Harrer Patient - Florida Cancer Specialists

Dr. William Harrer - Florida Cancer Specialists


Medical School

Jefferson Medical College – Philadelphia, PA

Internship and Residency in Internal Medicine

Cooper University Medical Center – Camden, NJ

Fellowship in Oncology/Hematology

Cooper University Medical Center – Camden, NJ

Board Certified

Medical Oncology


Internal Medicine

Professional Memberships & Associations

American Society of Hematology

American Society of Clinical Oncology

American Medical Association

Florida Society of Clinical Oncology