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Our Providers

Primary Care Providers


Kelvin E. Bailey, MD

Kelvin E. Bailey, MD, is a graduate of University of Kentucky Medical School.  He trained in Family Practice Medicine and completed a Fellowship in Obstetrics at the University of Kentucky Hospital.

Dr. Bailey has been practicing since 1996, the last 4 years at Central Ozarks Medical Center.  As a Family Practice physician, Dr. Bailey sees patients of all ages.  His interests within the medical arena are obstetrics, women’s health issues, nutrition, and insulin resistance syndromes to include diabetes.

Dr. Bailey is board certified in family practice medicine.

David Cathcart, MD


Angelia Cayou, BSN, FNP-C

Angelia Cayou graduated from Webster University with her Bachelors of Science-Nursing.  She went on to complete a Masters of Science-Nursing Adult and Gerontology from Maryville University in St. Louis, Missouri.  While earning her degrees, Angelia worked as an Intensive Care Unit nurse, Progressive Care Unit nurse as well as a Cardiac Catheterization Lab nurse. 

Angelia specializes in Adult and Gerontology patients (over the age of eighteen). 

Angelia joined Central Ozarks Medical Center in July of 2015.


Lisa. L. King RN, ARNP-BC

Lisa King is a graduate of North East Missouri State University (Truman University) with a Bachelor’s of Science in Nursing.  She continued her education at University Missouri-Columbia obtaining a Master’s of Science in Nursing as both a clinical specialist in pediatrics and a Family Nurse Practitioner. 

Lisa has been practicing as a Nurse practitioner for 30 plus years.  She has been with Central Ozarks Medical Center since 2008.  She is Board Certified as a Family Nurse Practitioner and is a member of both the American Nurses Association and the Missouri Nurses Association.  She is a volunteer for the Show Me Response Team.

When she’s not at the clinic, Lisa enjoys spending time with her family, hiking, and skiing.  You can find her anywhere outdoors whether it be horse shows or yard work. 

Lisa enjoys working with all age groups and finds her career very challenging and rewarding. 

Dan Schmidt, MD

Daniel M. Schmidt, MD, is a Summa Cum Laude graduate of LeTourneau University in Longview, TX, with a Bachelor of Arts in Chemistry.  He went on to complete his Medical Degree at Creighton University School of Medicine in Omaha, Nebraska where he graduated Cum Laude and his Residency at Wesley Family Practice in Wichita, KS. 

Dr. Schmidt has been part of the Central Ozarks Medical Clinic group of providers for over 18 years.

Dr. Schmidt has been Board Certified in Family Practice with the American Academy of Family Physicians since 1986 to present.  He is also a member of Christian Medical and Dental Association.

In his time away from the clinic, Dr. Schmidt enjoys spending time with his family, reading, playing golf, singing, and interacting with children who attend the Awana program at his church. 

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Barton Warren, MD

More information coming soon.


J.J. is board certified as both an Adult Nurse Practitioner and Acute Care Nurse Practitioner.  In 2015, she completed her Doctorate in clinical practice from Missouri State University, focusing on identification and treatment of osteoporosis in the rural internal medicine setting. 

J.J. has been in the nursing profession for more than 25 years with the past 10 as a nurse practitioner.  Her nurse practitioner experience has included cardiology, internal, occupational, and hospital medicine. She joined Central Ozarks Medical Center in 2016 and provides care in both the inpatient and outpatient setting.

Ms. Jones maintains active membership with the Missouri Nurses Association, Sigma Theta Tau, Society of Hospital Medicine, Missouri Hospital Association, and the American Academy of Nurse Practitioners. She recently had an article chosen for publication in the Orthopedic Journal of Nursing and was one of the conference speakers at the National Conference for Nurse Practitioners in May of 2016.

Sara "Ashley" Warren, DO

Dr. Ashley Warren has joined the Central Ozark Medical Center Richland Clinic. She is Board Certified in Family Medicine from the American College of Osteopathic Family Physicians. She completed her Residency in Family Medicine at Capital Region Medical Center in Jefferson City, MO, where she was the Chief Resident. During her residency, she also completed a fellowship in Integrative Medicine. Integrative medicine promotes health using both traditional medicine and alternative medicine.

She attended the University of Missouri-Columbia for her undergraduate degrees, receiving a Bachelor's of Science in Biology, Bachelor's of Arts in Sociology and a Honor's Degree. They married in May 2008.

She completed medical school at Kirksville College of Osteopathic Medicine (KCOM) in Kirksville, MO. She has a holistic approach to medicine and helps her patients improve the health of their mind, body and spirit. She enjoys all areas of medicine but considers her passions to be mental health, women's health (gynecology), pediatrics, Osteopathic manipulation (OMM) and Integrative Medicine.

Dr. Warren is an Ally to the LGBTQA community and considers her office a Safe Place for all people to receive care.

She is the niece of Dr. Barton Warren. Since deciding to become a physician, returning to practice at her hometown clinic with her uncle has been her goal . She is excited to be back in Richland. Her family has lived in the town since Reconstruction when her great, great grandfather, Captain H.E. Warren, helped to found the town.

Pediatric Providers


Kristen Theobald, DO

Kristen Theobald, DO, is a graduate of Truman State University, Kirksville, MO, with a Bachelor’s of Science in Biology and from the Kirksville College of Osteopathic Medicine Kirksville, MO, as a Doctor of Osteopathic Medicine.  Dr. Theobald completed her General Internship at the Moberly Regional Medical Center, Moberly, MO, and her Pediatric Residency at the Women and Children’s Hospital in Columbia, MO. 

Dr. Theobald has been the collaborating physician for Kids Harbor I and II since 2012 and most recently practiced at Moberly Regional Medical Center in Moberly, MO.  She joined the Central Ozarks Medical Center group of providers in July of 2015. 

Dr. Theobald is Board Certified in Pediatrics through the American Academy of Pediatrics, which she has been an active member of since 2006.

During her free time, Dr. Theobald enjoys golfing, swimming and spending time with her family.


Obstetrics and Gynecological Providers

Robert Nielsen, DO

Robert C. Nielsen, DO, is a graduate of Kirksville College of Osteopathic Medicine, Kirksville, MO.  He completed his internship at Des Moines General Hospital and residency at North Oakland Medical Center (Pontiac, MI).  Dr. Nielsen served in the United States Army from 1978-1982, the Iowa National Guard from 1982-1989, and in the Michigan National Guard from 1989-1995 where he served in Operation Desert Storm as a Major in the Medical Corps.

Dr. Nielsen has been practicing Medicine for 27 years and has been with Central Ozarks Medical Center since 2011.

Dr. Nielsen is Board Certified in Obstetrics and Gynecology and is a Fellow with the American College of Obstetrics and Gynecology.


Behavioral Health Providers

Michael Stone, PsyD

Dr. Stone received a Bachelor of Science degree in Psychology from Southwest Missouri State University and Master’s and Doctoral degrees in Psychology from the Forest Institute of Professional Psychology in Springfield, Missouri. He completed an internship at Wasatch Mental Health in Provo, Utah, and postdoctoral residency at Dakota Counseling Institute in Mitchell, South Dakota. He remained at this community mental health center for a period of about 10 years. While there, he served as the Chief Psychologist and Director of Training, and was very involved with the training of graduate students, interns, and postdoctoral residents pursuing doctoral degrees in Psychology. He is a past president of the South Dakota Psychological Association, and a member of the Missouri Psychological Association and Psi Chi National Honor Society for Psychologists.

Prior to joining Central Ozarks Medical Center, Dr. Stone operated a private psychological practice in the Osage Beach, and Jefferson City areas. His specialty areas of practice are psychotherapy with adults and older adult populations as well as psychological testing and assessments.

Dr. Stone resides on a small acreage near Iberia, Missouri. He and his wife, Jennifer enjoy spending time with their grandchildren and traveling. In addition, Dr. Stone is an avid collector of music, musician, and recording engineer. He also enjoys cooking for family and friends.


Danette Harrington, LCSW

Danette received her Bachelor‘s degrees in pre-medicine and psychology from Ohio Wesleyan University and the University of Louisiana.  She attended Concordia University for graduate training in School-Based and Christian Counseling and received her Master’s degree from the University of Nebraska in Clinical Social Work, majoring in individual and small group counseling.  

Prior to joining Central Ozarks Medical Center Danette practiced in an outpatient mental health clinic. Danette also worked as a medical clinical social worker with hospice, home health care, ER, nursing home and dialysis patients.

Danette started her career as a school social worker serving special education students. In addition, Danette started a therapeutic horseback riding program. 

Danette utilizes a service dog, Dollie, in her practice for those patients who desire to interact with pet therapy.  Danette spends time away from work on mission trips, including four in Afghanistan.


Oral Health Providers

Shayna Mattox, DDS

Dr. Shayna Mattox joined the Central Ozarks Medical Center Dental clinic as the Dental Director in July 2016.
Dr. Mattox grew up in Omaha, NE and became interested in dentistry in 8th grade while attending a career exploration program at Creighton University. She attended the University of Nebraska at Omaha and graduated magna cum laude with a Bachelor of Science degree in biology and minor in chemistry in 3 years. Dr. Mattox was a member of the university's swim team. She also met her husband, Dustin, and they married in 2013.
Dr. Mattox attended dental school at the University of Nebraska College of Dentistry and graduated with distinction in 2013. Dr. Mattox is a general dentist with interest in all areas of dentistry, and really enjoys seeing children. She is most excited to work with Dr. Taylor and expand dental care to children in the Richland and Camdenton areas!
Dr. Mattox is part of the American Dental Association, Missouri Dental Association, and the Academy of General Dentistry. Dr. Mattox enjoys spending free time at the lake boating, water skiing and relaxing with Dustin and their German Shepherd rescue, Sophie.

Evan Reynolds, DDS

Evan Reynolds is an honors graduate of Vanderbilt University with a Bachelor’s in Mathematics and the University of Tennessee-College of Dentistry where he earned his Doctor of Dental Surgery degree.

Dr. Reynolds joined Central Ozarks Dental Center in May of 2015.

Dr. Reynolds is a member of the Academy of General Dentistry as well as a member of the Central Dental Association, Missouri Dental Association and American Dental Association and has a professional working proficiency in Spanish.

When he is not working in the clinic, Dr. Reynolds spends his time enjoying the many great fishing and hiking locations around the Ozarks, playing the piano and following his ill-fated Vanderbilt Commodore athletic teams.

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Kyle Shull, DDS

Dr. Shull grew up in the small town of Higginsville, MO. He attended college at Missouri State University in Springfield, MO and obtained both a Bachelor of Science in Biology and a Master of Science in Biology. He attended dental school at the University of Missouri-Kansas City and obtained his Doctorate of Dental Surgery degree in 2011.

Dr. Shull loves helping his patients with all their dental needs, from getting out of pain to improving their smile. He enjoys treating people of all ages, from children to adults.

Dr. Shull lives in Columbia with his wife and two boys. When he's not practicing dentistry, Dr. Shull enjoys running, reading, and spending time with his family. He is an avid fan of the Kansas City Royals and Chiefs.



Richland Location
304 W Washington Ave.
P.O. Box 777
Richland, MO 65556
Medical Center: (573) 765-5141
Dental Center: (573) 765-2510

Osage Beach Location
3870 Columbia Ave.
Osage Beach, MO 65065
Medical Center: (573) 302-7490

Camdenton Location
948 East US Hwy 54
Camdenton, MO 65020
Medical Center: (573) 346-4446

Stone Castle Location
404 W. Hwy. 54
Camdenton, MO 65020
Medical Center: (573) 317-9200

For urgent health care needs
after hours call 573-348-8000.

  • Primary Care
  • Obstetrics
  • Pediatrics
  • Behavioral Health
  • Women's Health
  • Senior Health
  • Dental

We accept all patients, with or without insurance. We pride ourselves on offering quality healthcare that works best with your financial situation.

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