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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. Andres Macouzetborn and raised in Mexico City. Graduated with honors from the UNAM (Universidad Nacional Autonoma de Mexico ) in 2002 and started to work for Dr. Ramos (surgeon) and Dr. Ramirez ( internal medicine),owners of a Private Equine Hospital in Mexico City. After two years of general practice, hospital and ambulatory cases, he moved to California where he had the opportunity to be mentored by Dr. Van Snow at Santa Lucia Farm. The practice introduced him to western performance horses and allow him to gain experience in sport medicine. He returned to Mexico City and worked for Dr. Ulibarri and had the opportunity to work with high level show jumpers and dressage horses. In 2006 Andres returned to California to focus on sports medicine with Dr. Van Snow and Dr. Ian Campbell.

Andres’s interest are in ultrasound, imaging and new technologies.

In his free time he enjoys spending time with his wife Jennifer Wooten, a three day eventing trainer and son Santiago. He enjoys outdoor activities, horse shows and traveling as a family.


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