Lissel Madrazo, D.V.M.

Dr. Lissel Madrazo has been working as a small animal veterinarian for 21 years. She started working in Lacy, WA before moving to Oxnard, CA where she worked in Banfield Pet Hospital while doing relief work in other privately-owned hospitals until January 2007. She then owned and operated a Banfield Pet Hospital franchise in Fremont, CA. Her interests are primarily small animal (dog and cat), preventative care, soft tissue surgery, dermatology and internal medicine. She has been the owner and veterinarian of Yosemite Pet Hospital since October, 2017 and has loved getting to know Simi Valley’s pets and their families.

Dr. Madrazo graduated from the University of the Philippines as a Doctor of Veterinary Medicine, placing 7th overall in the national Philippine Veterinary Licensure Exam. She moved to Northern California and worked as a veterinary technician at several veterinary hospitals, including the Intensive Care Unit of the University of California Veterinary Teaching Hospital at Davis. She successfully completed the requirements to obtain a veterinary license in the US via the ECFVG program in July 1996, including a one year internship program at the Purdue University School of Veterinary Medicine in Lafayette, IN.

Dr. Madrazo enjoys traveling with her husband and two kids. She shares her home with several fish, a frog named “Blaze,” a kitty named “Lulu” and a golden-doodle named “Lillie.”


Keny has been working around animals since the young age of 15. She is originally from El Salvador and moved to the Los Angeles area at a young age. Since moving to California, Keny has volunteered at ASPCA Los Angeles, Lange foundation and has worked in many fields in an animal practice. She is currently our head technician working hand in hand with Dr. Madrazo in almost all surgeries and dental procedures. Keny enjoys almost anything outdoors; her all-time favorite thing to do on her time off is to go hiking and spend time with her 3 Chihuahua babies. Even on her off time you can find her researching new products or procedures to help educate her along the way in her vet tech career!


Priscilla started at a young age with a love and passion for all animals. She wasn’t allowed to have any pets as a child, so she started puppy/kitten sitting for others. Shortly after high school she started her own kitten and puppy day care called “ Kitten and Puppy Paws Day Care.” When she moved out of her parents’ home she started adopting her own fur babies. Priscilla now has four dogs named Miracle, Lola, Hazel and Blue, and hopes for more in the future. Priscilla loves working at Yosemite Pet Hospital caring for your puppies and kittens as well as senior pets.


Isabel grew up in Norco, CA on a strawberry farm with cats, chickens, dogs, goats and rabbits. From a young age she knew that she had a strong love for animals which led her to pursue a career in the veterinary field as a receptionist. In her free time she enjoys spending time with her family and working on upgrading her car with her husband. Isabel is very eager to learn all there is to know about working in a veterinary practice and is excited to be part of the Yosemite Pet Hospital team!


Tiffany loves all creatures, big, small, furred, scaly and feathered. She especially loves all the good old boys and girls that love to be loved. She and her fiancée and their little dog Rocky enjoy taking trips to the beach, snow, and hiking. She is currently studying to become a Registered Veterinary Technician.


Valerie is dividing her time between the YPH family and studying at Moorpark College to pursue a career in Orthodontics. She has always had a passion for animals and loves being able to work with them. She has a one year old Shih Tzu named Nina and is hoping to find a brother or sister for her. In her free time she enjoys going to the gym, spending time with her family and friends, going on long drives, and going to her favorite eatery, Ubatuba Açai. Valerie is very excited to meet more furry friends and being able to help them out.


Stephany may be the first person you meet at the reception desk at YPH! She is currently going to school for a degree in business administration and marketing. She loves getting to meet new clients and so many amazing pets and being able to help them. She has 2 dogs of her own and plans to have many more in the future. She enjoys spending time with her friends and family, taking workout classes, and traveling.


After participating in her high schools Veterinary Assistant program, Naomi discovered a newfound passion for working with animals. Despite being an animal lover from a young age, Naomi was never allowed to have pets until three years ago when she unexpectedly became a cat mom. She now has four fur babies of her own which she enjoys spending her free time with and giving them lots of cuddles. Joining the Yosemite Pet Hospital team has encouraged Naomi to continue her education in the veterinary field and work towards becoming a Registered Veterinary Technician. Naomi is very excited to be on this journey and is looking forward to learning new things and meeting more furry friends along the way!