Our personalized care approach stems from the very personal passion of our physicians, Dr. Castillos, a board-certified hematology and oncology specialist, and Dr. VanSweden, our primary care physician who is board-certified in Internal Medicine. Learn about their impressive credentials, and read patient reviews:

Dr. Francisco Antonio (Tony) Castillos, III
Board Certified Oncologist
Board Certified Hematologist

photo of Dr. Antonio Castillos, personalized physicians

Meet Dr. Tony Castillos, our founding physician. Dr. Castillos has devoted his career to furthering precision oncology through advanced genome testing, including tumor profiling and blood-based cancer diagnostics. Under his leadership and by his example, our practice emphasizes an individualized approach to each patient’s case, delivering personal, compassionate care.

Board Certification:
Internal Medicine
Medical Oncology

Medical School:
Chicago Medical School

Yale University
Norwalk Hospital

Internal Medicine, Medical College of Virginia, Virginia Commonwealth University

Hematology fellowship, University of Alabama, Birmingham, Alabama
Oncology fellowship, University of Louisville, Louisville, Kentucky

Overseas Service:
United States Navy, Lieutenant Commander
Served with the 1st Marine Division for Alpha Surgical Company during Operation Iraqi Freedom, 1st FSSG, 2003

Professional Interests:
Myeloproliferative disorders
Leukemia Research Fellowship
Cancer Care Chairman, Nash Hospital

Dr. Paul VanSweden
Primary Care Physician
Board Certified Medical Internist

photo of Dr. Paul VanSweden, personalized physicians

Meet Dr. Paul VanSweden, our primary care and internal medicine physician. He is particularly interested in helping patients develop healthier lifestyles – by managing diabetes and high blood pressure, reducing tobacco and alcohol use, and lowering obesity, among other treatments. Dr. VanSweden also helps treat patients in our Certified Infusion Center.

Board Certification:
Internal Medicine

Medical School:
Michigan State University, College of Human Medicine

Internal Medicine and Pediatrics, University of North Carolina Hospitals

Previous Experience:
Hospitalist at WakeMed Hospitals – 2014 – 2021

Professional Interests:
Healthcare for 55+ population
Personalized care at the individual patient level

Our personalized physicians are experts in hematology, oncology and primary care. They receive rave reviews from patients across Raleigh, Durham, Wake Forest and beyond. Read what our patients have to say:

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