Meet the Apple Valley Animal Hospital Veterinarians

Eryn Dinisi, DVM, Medical Director

Dr. Dinisi grew up in Southern California where she attended California State Polytechnic University at Pomona for her Bachelor of Science Degree in Animal Science.  Continuing her quest for her degree in Veterinary Medicine, Dr. Dinisi attended the Atlantic Veterinary College of Prince Edward Island, Canada, where she graduated in 2016 with her DVM.  After completing her education, she returned home to practice small animal medicine with a passion for surgery.  In her free time, she loves spending time with her family and hiking with her Australian Cattle dog, Jonesy.

Clifford L. Jessen, DVM

Dr. Clifford L. Jessen hails originally from Lexington, Nebraska. Since opening Apple Valley Animal Hospital in 1987, he has been providing highly skilled, compassionate veterinary medicine to dogs, cats, birds and many exotic pets in the High Desert for over 30 years. He earned his bachelor’s degree from the University of Nebraska and his Doctorate of Veterinary Medicine from Kansas State University. Dr. Jessen is a member of the American Animal Hospital Association.

When not at work, Dr. Jessen enjoys cycling, exercising, singing, traveling and “any activity involving family time together.” He and his wife Karen, who is the Hospital Manager, have five children, five grandchildren and a chocolate Lab named Dane. Dr. Jessen is also an active member of the Rotary Club of Apple Valley, sings in his church choir, and volunteers with the Make-A-Wish Foundation, where he serves as a Wish Granter.

Tess Clark, DVM

Born in San Diego, California, Dr. Clark moved to the high desert town of Lucerne Valley shortly before her second birthday.  It was here that she raised many different animals and was active in 4-H.  After graduating from Apple Valley High School, Dr. Clark attended Brigham Young University.  She continued her education at Ross University School of Veterinary Medicine and finished her clinical year at Purdue University in West Lafayette, Indiana.  After graduating in 2008, Dr. Clark practiced veterinary medicine in Ohio and Utah before returning to California and joining our practice.

Andrea Sherman, DVM

Born and raised in California, Dr. Sherman fell in love with veterinary medicine as a child while listening to James Harriot audiobooks with her parents.  Throughout her early school years, she was an active member of 4-H and raised a large variety of animals.  She began her path to becoming a veterinarian at the University of California at San Diego.  She went on to attend Ross University, School of Veterinary Medicine where she graduated with her DVM in 2017.  She completed her clinical year at the University of Minnesota.  Dr. Sherman has had the opportunity to work with wild life, zoo animals and exotic pets during her time in veterinary school and looks forward to working with all animal species.  She currently lives in Apple Valley with her husband and their newest addition to their family Pippin, their Labrador mix.