Our Staff


Continuity Care


David “Gus” Vickery, MD

Dr. Vickery is a graduate of the Medical College of Georgia and a member of the Alpha Omega Alpha honor society. He is a board certified family physician and started Vickery Family Medicine, which is designated as a patient-centered medical home, in 2005. He is associated with the University of North Carolina at Chapel Hill’s Department of Family Medicine, hosting medical students for their family medicine rotations. Dr. Vickery also participates in the Minority Mentoring program through the Mountain Area Health Education Center. He maintains privileges at Mission Memorial Hospital and is the Medical Director for the Biltmore Company. When not working, Dr. Vickery enjoys spending time with his wife and three children and exploring the outdoors.


Jan O’Hara, WHNP

Jan received her BS in Biology and Ecology from Emory University in 1994. She completed her Master’s in the Science of Nursing in 1999 at Vanderbilt University. Jan has worked in a variety of settings including spending one year doing volunteer work in Honduras. Jan and her family have lived in Asheville since 2004. She enjoys trail running, outdoor activities and live music.

Kimberly Heiselman, MD

Kimberly Heiselman, MD

Dr. Heiselman is a dedicated board-certified family physician with 23 years of experience practicing in western North Carolina. Her medical degree is from the University of Rochester School of Medicine. She completed residency training at Mountain Area Health Education Center (MAHEC), followed by a Rural Medicine Fellowship at MAHEC, and a Faculty Development Fellowship at UNC Chapel Hill. She has special interests in preventive medicine, and the use of mindfulness/meditation in promoting good health. Much of her free time is spent outdoors, often hiking, biking, or boating, but also quietly appreciating the natural world.


Dr. Troy Jackson

Dr. Troy Jackson loves his role as a family medicine physician to develop lasting relationships with his patients while encouraging and guiding them along their journey to a better self. He has a special interest in pediatrics, chronic disease management, and lifestyle medicine, but Dr. Jackson finds all aspects of primary care fascinating. After growing up in central Mississippi and attending The University of Mississippi for both his undergraduate and medical school educations, Dr. Jackson completed his family medicine residency at the MAHEC Family Medicine Residency Program here in Asheville, NC. Outside of clinic, Dr. Jackson enjoys spending quality time with his wife while hiking and biking through nature, tending to their garden, and keeping active in their church.

Walk-in Care


Stanley Hamaker, MD

Dr. Hamaker attended the University of North Carolina at Chapel Hill for college and medical school.  He completed a residency program in family medicine outside Pittsburgh, PA in 1985. He then worked in a rural area in southern West Virginia for 18 years and has worked at several locations in Asheville since moving here in 2003. He joined the team at Vickery Family Medicine in February 2016.  He has been married for almost 40 years and has 4 children who live in the area. He enjoys working in his yard and participating in any sport he can still manage to play.  Dr. Hamaker sees walk-in patients at Sona.


Emily Mahowald, FNP

Emily graduated from Warren Wilson College with a degree in Economics and Human Studies. She went on to study nursing at Western Carolina University and then graduated from the Family Nurse Practitioner program at East Tennessee State University. She has two young sons, and enjoys kayaking, mountain biking, running, and playing Legos with her boys. Emily sees walk-in patients at Sona.

Support Staff


Talina Briscoe, Clinical Manager

Talina, who has been with Vickery Family Medicine since 2005, is our Clinical Manager and Director of Operations. She lives in Asheville with her husband, daughter and grandson. She enjoys spending time with her family and friends. She also enjoys fishing and bowling.


Cullen Covington-Hicks, PA

Cullen is a North Carolina native who moved to Asheville 16 years ago after obtaining her degree from the University of Florida. She also has a Masters in Counseling Psychology from the University of North Florida. She has worked extensively in Internal Medicine and Family Practice. She is happy to be back in NC and enjoys trail running, playing with her dog Tucker, and choral singing. She is married and has a grandson who lives in TN with his parents. Cullen sees patients at our Biltmore Clinic.


Margarita Gonzalez, Program Director

Margarita coordinates programs, communications and special projects for VFM, including Synergy, which she and Dr. Vickery started in 2015. A graduate of Texas A&M University, she’s lived in Asheville since 2002 and serves on the Development Council of the Western Carolina Medical Society Foundation. She is a doting aunt to two extraordinary nieces and enjoys gardening, cooking, watching baseball and spending time outside.


Joshua Klaaren, PA

Joshua Klaaren received his Physician Assistant certificate and M.H.S. from Duke University School of Medicine in 1995. He began Family Practice work in Asheville in 1995 and lives here with his two daughters. During his spare time, Josh enjoys outdoor recreation and building things in his shop. Josh has worked at our Clinic on Biltmore since its inception in 2012 and proudly serves our Biltmore community.

  • Board-certified in Family Medicine
  • Certified as a Patient-Centered Medical Home (PCMH)
  • A health delivery and consulting organization providing direct primary care to individuals and employers
  • Medical Director for the Biltmore Company
  • Medical Consultant for CooperRiis Healing Community
  • Preceptor for UNC-Chapel Hill Medical School Department of Family Medicine resident program
  • Teaching site for MAHEC Minority Mentoring program
  • Maintains active privileges at Mission Hospital
  • Member of the Association Board of the Western Carolina Medical Society; served as President in 2014
Awards and Honors:
  • Member, Alpha Omega Alpha National Medical Honor Society
  • Three-time Best of WNC Best Family Physician (Mountain Express)
  • Angie’s List Super Service Award 2011-2014, indicating excellence in customer service
  • Asheville Chamber of Commerce Small Business of the Month, October 2015
  • Speaker, World Congress Executive Conference for Onsite Healthcare (hosted by National
    Association of Worksite Health Centers), 2014, Orlando, FL
  • Speaker, Empowering Self-Care (hosted by Crescent Health Solutions), 2015, Asheville, NC
  • Co-chair, Moving Healthcare Upstream (initiative of Asheville Chamber of Commerce Economic Council) 2013-present

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