“Please, just call me Chuck.”

Chuck Kilo founded GreenField Health in 2001.  At that time, the CEO’s ambition was to deliver an individual customer experience based on deep, trust-based relationships, impeccable service and highly reliable care.  Today, that goal remains the enduring reality in GreenField’s infinite journey.

Chuck recognizes that quality health care is important, but from the patient’s perspective, it can be complex and expensive. Individuals need trusted guidance to navigate a fragmented system. That is why Chuck has dedicated his career to addressing the challenges of the U.S. health care system.  GreenField is proud to be part of that journey AND part of the solution.

“From the outset, GreenField’s mission was to recreate primary care to better serve individuals and our society,” reflects Chuck.

Chuck completed his medical training at Washington University School of Medicine in St. Louis. His outstanding credentials also include an infectious disease fellowship and a Master of Public Health from Harvard.

Chuck continues to improve GreenField’s patients’ experience.  “I seek to be your personal physician, a key partner in your health, a counselor at times and your confidant when needed,” says Chuck. 

And that is the individual experience Chuck’s patients have grown to know and trust.


Professional Qualifications

  • GreenField Health, 2000-2010 & 2017-present
  • Oregon Health & Science University, 2010-2017
  • Institute for Healthcare Improvement, Boston, 1995-2000


  • Master of Public Health, Harvard School of Public Health, Boston, 1995
  • Infectious Disease Fellowship, Harvard Combined Infectious Disease Program, Boston, 1995
  • Internal Medicine Residency, Barnes Hospital/Washington University School of Medicine, St. Louis, 1990
  • Doctor of Medicine, Washington University School of Medicine, St. Louis, 1987
  • Bachelor of Science, Biology, University of Missouri, Kansas City, 1983

Board Certification

  • American Board of Internal Medicine, since 1990

Participating in Maintenance of Certification