Nextera Healthcare- Southeast Jacksonville

Nextera Healthcare’s direct primary care membership for individuals, families and businesses provides a convenient, cost-effective solution for those looking to get more out of their primary care coverage.

Nextera Healthcare providers offer year-round, comprehensive adult and family primary care services, including but not limited to:

  • Acute care and chronic disease management
  • Allergy evaluation and management
  • Dermatology
  • Mental health, including treatment for depression, anxiety and other mood disorders
  • School, sports and workplace physicals
  • Sleep hygiene assessments and support
  • Stress management
  • Treatment of sprains, lacerations and broken bones
  • Weight management and health risk assessment
  • Women’s health
  • Well checks for infants and children
  • Preventive health care
  • Same-day appointments or next-day appointments based on medical need.
    Please call 911 in the event of a medical emergency.

In addition to the services above, Nextera Healthcare membership offers patients:

  • After-hours care for more urgent medical needs (non-life threatening emergencies)
  • Remote or virtual access to physicians via email or phone if you are busy or traveling
  • Deeply discounted imaging and laboratory services

* The list of medical services offered may be subject to change

Our Providers

William Nields, MD

Read Bio

William Nields, MD


I chose a medical career to help people and am proud to say that after all these years I still receive my greatest reward from seeing people set free from their health struggles to live their best life. In primary care I have the privilege of developing lasting relationships with my patients which allows me to help them as a whole person: mind, body, and Spirit. With Direct Primary Care I am able to serve people in my community with a spirit of excellence at a fair price. I graduated from the University of Colorado in 1993 and spent 5 years pursuing a career racing off road bicycles. During this period, I worked many jobs to support myself and travelled to many places around the world. The experiences I gained during this period are invaluable to my career as a Medical Doctor. At 27 years old I was accepted into the University of South Florida College of Medicine in Tampa. In 2002 I graduated and moved to Jacksonville, FL where I entered residency at the Mayo Clinic. My years at Mayo taught me to be a doctor, but my training didn't end there. I continue to pursue learning and have developed expertise in lifestyle medicine, functional medicine, and the latest advances in traditional western medicine. My mission has been to develop a team and a system to optimize our patients’ health and eliminate chronic diseases by treating the root causes of illness. We understand that “no man is an island” and we work hard at developing healthy communities. We exist to provide patients an alternative to a broken medical system. A holistic and root cause analysis approach utilizing allopathic, naturopathic, and functional medical modalities better offers our patients the opportunity to take control of their health and live their lives to the fullest potential.