El Dorado’s Top Rated Local® Family Health Clinic

Offering exemplary health care services, backed by decades of experience and knowledge in a variety of healthcare methodologies, we are El Dorado Clinic. With a focus on primary care, our compassionate doctors and staff of healthcare professionals work together to support and enhance treatment plans with patient-focused care. Our entire medical team strives to take an integrative approach to health by providing individualized medical services that are focused on your unique needs, goals, and objectives.

Our History

The El Dorado Medical Group originated in 1947 with the merger of two groups with offices on West Central in the Smith Building. The original physicians were Doctors Boudreau, Brian, Dillenbeck, and Overholser in one group and Doctors Kassebaum, Williams, Hammel, and Cloyes in another.

The group moved to 300 South Main in 1952 into the Skelly Oil Company office building and renamed the practice The El Dorado Clinic, P.A. and moved to 119 Jones in November 1974. August of 1999 brought another move to the practices’ current location at 700 West Central, Suite 205.

Dr. James Shields joined the group in 1948 and retired in 1987, Dr. B.E. White joined in 1956, retiring in 1993, and Dr. R.W. Proctor joined the group in 1966, retiring in 2002. Numerous other physicians have been affiliated with our facility throughout the years, including Doctors McGonigle, Stephan, K.B. Dellett, Sullivan, Doornbos, Walling, Sandberg, Outwater, and Brunton.

Doctor Diane Nightengale, MD, F.A.A.F.P. joined the practice in 1989 and continues practicing today. Doctor Cathy Cooper joined the practice in 1990, and retired in 2017. Doctor Crystal Faudere, DO, joined the practice in Sept. 2008.

The clinic also employs one Physician Assistant, Russ McCaig, P.A.-C, who has been with the practice since 1995, and Alexa McGraw, APRN, who joined the team this summer.  We also employ 16 other full-time employees.


From the treatment of acute illnesses such as seasonal colds to the care of long-term health issues, we work to help our patients maintain a level of wellness that ensures optimal quality of life.