Meet Our Doctors
Andrew Grange, BSc (Hons), BVetMed, Diplomate ACVS
Dr. Andrew Grange is a Diplomate of the American College of Veterinary Surgeons, Chief of Staff, and owner of OakVet Animal Specialty Hospital. He attended University College London where he received his bachelor's degree in orthopedic science, and then graduated in 2008 from the Royal Veterinary College in London with a degree in veterinary medicine. Following graduation he completed a rotating internship in Southern California, and a residency in small animal surgery at Angell Animal Medical Center in Boston, MA.
His professional interests include the application of minimally invasive surgical techniques (Arthroscopy, Laparoscopy, and Thoracoscopy) in the management of soft tissue and orthopedic disease, and the surgical treatment of cruciate disease, fractures, and Total Hip Replacement.
Dr. Grange's personal interests include skiing, cycling, ice hockey, and spending time with his wife, Allison (also a veterinarian), children Amelia and Ethan, their dog, Abby, and 5 cats.
Jamie Wignall, BVetMed (Hons), MS, Diplomate ACVS
Dr. Wignall comes from a family of veterinarians in the United Kingdom, and after pursuing veterinary school at the Royal Veterinary College in London, he returned home for a year in rural mixed animal practice. Adventure beckoned, and he completed his surgical training at Louisiana State University where he found a southern girl, a love for the New Orleans Saints and a terrier called Maverick. He then worked in Southern California for 4 years where the family expanded to add two more terriers, Biffy and Ziggy. His hobbies include snowboarding, soccer, hiking and spending time with his partner, Luli, also a veterinarian.
His professional interests cover all aspects of orthopedics, soft tissue, and neurosurgery, with a particular emphasis on the upper airway and minimally invasive surgery. Practice management has become a new interest and he is studying towards a Masters in Business Administration.
Benjamin Polansky, DVM, Diplomate ACVIM
Dr. Polansky is originally from Boston, MA where he earned his degree in Veterinary Medicine from Tufts University. It was during his internship at Louisiana State University School of Veterinary Medicine where he discovered a keen interest in the internal medicine specialty. He continued his training with an Internal Medicine residency at MedVet Medical and Cancer Center for Pets in Columbus, Ohio. Upon completion of his residency, he practiced at a high volume speciality hospital in southern California for the past four years. Now Dr. Polansky is extremely excited for the opportunity to be part of the Oak Vet family. He has a particular interest in immune-mediated and gastrointestinal diseases, he values the human-animal bond, and is passionate in preserving and strengthening that relationship through medical intervention.
As an active, outdoor lifestyle enthusiast Dr. Polansky enjoys hiking, running, and working out. He also loves exploring the area and spending time with his wife and daughter, as well as his two dachshunds. True to his northeast coast roots, he is an avid New England Patriots fan (Go Pats!).
Justin Williams, DVM, Diplomate ACVIM/Cardiology
Dr. Justin Williams completed his undergraduate degree at the University of California at Los Angeles before obtaining his veterinary medical degree in 2007 from Colorado State University. He then completed an internship in small animal medicine and surgery at Wheat Ridge Animal Hospital in the Denver metropolitan area. Dr. Williams finished a three-year cardiology residency at the MSPCA Angell Animal Medical Center in Boston, and earned board certification in cardiology from the American College of Veterinary Internal Medicine in 2011. Originally from Arizona, he enjoys the outdoors alongside his wife, Emily, and their three children. His hobbies include fly-fishing, hiking, photography, drawing, and ice hockey.
STACEY SONNENSHEIN, MS, DVM
Dr. Stacey Sonnenshein is a graduate of the veterinary program at Colorado State University. She completed an internship at the Ohio State University. She has been a practicing emergency veterinarian for almost a decade, and for the past 5 years here in the East Bay. She is an avid gardener and lives with her partner, Adam, and their pack of three elderly dogs and four wonderful chickens.
LEEANN LAXINETA, DVM
Dr. LeeAnn Laxineta completed her degrees in microbiology and Doctorate of Veterinary Medicine at UC Davis. She has been practicing emergency medicine in the Bay Area since 2015. Outside of the ER, she enjoys hiking, snowboarding and spending time with her husband, Tim and pets Larry David and Bebop.
Erin Updegrove, DVM
Dr. Erin Updegrove graduated from the UC Davis School of Veterinary Medicine and pursued an emergency-focused internship outside of Washington, D.C. She has been practicing emergency medicine in the Bay Area since 2011. Outside of the ER, she is passionate about volunteering her time to underserved communities across the United States and internationally. Dr. Updegrove works with several organizations that provide free veterinary care for the public, as well as training for new graduate veterinarians and students. In her spare time, she enjoys gardening, hiking, and enjoying the Bay Area while sharing her home with an energetic pit bull named Riza.