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Dr. Mark Revenaugh is the owner of NWEP. He is a renowned expert in the diagnosis and treatment of lameness and performance issues, attracting clients from all over the northwest. His fascination with equine medicine and competitive performance began long before opening his specialty clinic in the Oregon.


Though he studied riding under eventing icon Bruce Davidson, and spent several years in human medical research, his passion was always focused on helping owners and horses maximize their performance potential.


He pursued that passion at the University of Illinois College of Veterinary Medicine, graduating in 1991. Dr. Revenaugh worked with some of the leading sport horse veterinarians in the world, including Dr. Kent Allen, Dr. Haynes Stevens, and Dr. Brendon Furlong. During this time, Dr. Revenaugh authored the first license for use of scintigraphy (bone scan) in the state of New Jersey in 1996. In 1997, Dr. Revenaugh took his first trip as official USET Team Veterinarian, traveling to Germany for a pairs Driving World Championship. Dr. Revenaugh has been honored to serve as a Team Veterinarian or Assistant Team Veterinarian since that time. Duties have included selecting, treating and advising elite level professionals in the equine industry, maintaining health and maximizing performance.


Dr. Revenaugh moved to the Pacific Northwest in 2002 where he intended to create a small and unique practice to work exclusively with equine performance issues and lameness. The clinic quickly grew into one of the premier equine sports medicine practices in the western United States reflecting Dr. Revenaugh's investment in advanced technologies, imaging modalities, and leading edge therapies. Dr. Revenaugh has also served as the Director of the High Performance Sports Group since 2013 in an effort to help further not only the sport, but the profession as well. 


His greatest professional joy remains being part of a winning team; helping horses and owners make good decisions to advance equine health and maximize performance.


Dr. Revenaugh lives on a farm in Mulino with his wife and 2 children. They enjoy outdoor activities including bicycling, camping, and exploring this beautiful region.




Dr. Rachel Buchholz is a senior associate veterinarian at NWEP. She is originally from Howell, Michigan and has been around horses for as long as she can remember. She rode a variety of disciplines growing up and showed her horse Romeo all-around on the Pinto circuit to multiple regional and national titles.


She has aspired to become an equine veterinarian since childhood and attended Michigan State University receiving both her Bachelors in Animal Science and her Doctorate of Veterinary Medicine. During her time at MSU she worked at the world renowned Mary Anne McPhail Equine Performance Center with Dr. Hilary Clayton and Dr. Narelle Stubbs studying equine spinal anatomy, pathologies, and therapies. She also spent time at various equine clinics in Texas and Australia focusing on equine sports medicine. Following veterinary school she moved west, and has been with NWEP since. 


Dr. Buchholz splits her time between clinic cases and farm calls/ horse shows. She also runs the NWEP standing MRI providing diagnostic imaging support and treatment/ rehabilitation advice for our clients and referring veterinarians. 


Dr. Buchholz's professional interests include equine physiotherapy, advanced diagnostic imaging and western performance horse issues. 


When not at the clinic, Rachel enjoys wine tasting, MSU Spartan football, and trips to the Oregon coast with her husband Jake and her dogs Rosalie and Westley.




Dr. Rebecca Roth joins the team at NWEP as the newest associate veterinarian. Dr. Roth grew up in Idaho and Montana where she developed a passion for animals, the great outdoors and, of course, riding horses. She moved to Oregon for college and obtained a B.A. in Psychology from Lewis and Clark College. Pepa was always drawn to the veterinary world and decided to wholeheartedly pursue veterinary medicine as a career.


Dr. Roth received her Doctorate of Veterinary Medicine with honors from Oregon State University in 2019. She completed her internship at B.W. Furlong & Associates, in New Jersey, where she rotated through internal medicine, surgery, ambulatory/emergency, and sports medicine/rehabilitation services. Pepa continued her education by learning the theories of traditional Chinese veterinary medicine (TCVM) and becoming certified in acupuncture at the Chi University. She is currently studying veterinary medical manipulation therapy and is excited to offer these services soon. 


Dr. Roth's professional interests include integrative medicine, rehabilitation, and advanced diagnostic imaging. She enjoys riding her horse, Bailey, relaxing with her cat, Bo, and spending time with her friends and family.