New Client Special – $25 off your first visit! Call for more details.
Click here for our latest COVID updates.

Updated 8/30/22

Island Cats Updated Face Mask Policy

As most of us are aware, mask recommendations are frequently changing and we at Island Cats Veterinary Hospital try to keep up on the most recent advice from the Center for Disease Control.

Effective immediately, we are no longer requiring clients to wear a face mask while in the building. We will continue to provide masks to those clients who still choose to wear a mask indoors. You may still see some of our staff wearing masks for their own protection, as well as in exam rooms since it is a small space.

We still ask that only one client accompanies their pet into the exam rooms unless it is a critical case. If you are feeling ill, have tested positive for Covid, or have been exposed please follow the CDC guidelines for isolation and reschedule your appointment if needed.

The safety and health of our clients and staff is paramount. We will continue to keep everyone advised if there are any further changes.

Thank you!

Island Cats Veterinary Hospital

Mercer Island, WA

Our Veterinary Team

Our veterinary team is here to help. At Island Cats Veterinary Hospital we treat you and your pets like our family,


Low-stress Environment

Compassionate Service

Meet our Veterinary Team of

Devoted Cat Care Professionals

Dr. Simmons

Timarie Simmons, DVM


Timarie Simmons, DVM Dr. Simmons has been practicing veterinary medicine since 1998 but has been working in the field since 1985. She enjoys medicine and surgery and has had a long-term interest in animal welfare medicine. Although she has practiced medicine on exotics, dogs and cats, her love for cats led her to seek out an opportunity to focus on just feline medicine. She has a special interest in brachycephalic breeds but loves all types of cats! She believes owner education and communication is important in making care plans that work for each client’s family and their pet.

Dr. Sophia Kassotakis

Sophia Kassotakis, DVM


Dr. Sophia Kassotakis was born in California and received her Doctorate of Veterinary Medicine from the UC Davis School of Veterinary Medicine in 2017. She has worked as a veterinarian in California, New Jersey, Pennsylvania, and now Washington.

Dr. Sophia takes pride in the connections and relationships she develops with people and feline loved ones. She believes in the human-animal bond and its ability to make the world a more compassionate, caring place. Medically, her interests include Geriatrics.

She’s excited to explore Washington and embark on new outdoor adventures. She also enjoys reading and relaxing on the couch with a hot cup of tea and her cats, Atlas and Mary Margaret.

Dr. Simmons

Valerie Hargett , DVM

Associate Veterinarian

Dr. Valerie Hargett is an experienced Associate Veterinarian with 22 years of practice in the field. She graduated from Washington State University Class of 2000 and obtained a Master of Science in Veterinary Infection and Disease Control from the University of Liverpool in 2008. Dr. Valerie’s professional interests include geriatric medicine, internal medicine, and diagnosing difficult cases and symptoms. She prides herself on being able to communicate effectively with pet owners, making them partners in their pet’s health and care management. In her free time, Dr. Valerie enjoys gardening, canoeing, camping, traveling, and cooking with her husband, Marshall. She was born and raised in Bellevue, Washington, where she still lives in her childhood home. Dr. Valerie is a proud owner of a long-haired tortoiseshell calico named “Tortie” and has taken in a local community cat named “Tubby.” She is also an avid Seahawks and Mariners fan.

Meet our Veterinary Staff

Hayla - Licensed Veterinary Technician


Licensed Veterinary Technician

Hayla's Bio
Hayla is a licensed veterinary technician who joined the Island Cats team in 1999. She has a passion for feline medicine with a special interest in feline behavior and nutrition. She assists veterinarians in dentistry, surgery, radiology, and patient care. In her free time, she enjoys photography, exploring the PNW, live music, and spending time with her 5 cats Sherman, Finley, Roxie, Bennett, and Emmett.


Veterinary Technician

Naomi's Bio
Naomi graduated from Washington State University in May 2020 and joined Island Cats
Veterinary Hospital in November 2020. She volunteered with Animal Compassion Team
where she rescued her 6 cats and 2 dogs. Her friends and family refer to her as the “Cat Whisperer” because of her genuine love for cats and her ability to put them at ease. She is so happy to be a part of the Island Cats family!



Client Care Coordinator

Kayla's Bio

Kayla joined Island Cats in 2022 as a Client Care Coordinator. Kayla’s passion for animals, and more specifically for cats, are what lead her to pursue a career in the veterinary field. She and her family share their lives with three cats. They have a tabby cat named Pepper, a tuxedo cat named Takoyaki, and a calico named Wheatie. When not at work Kayla spends her time with her kiddos playing video games, creating Perler bead art, and cooking and baking. Kayla frequently spoils her coworkers by bringing in her baked goods to share with everyone. Yumm!