Welcome to Harborside Veterinary Hospital

At Harborside Veterinary Hospital, we know how important your pets are to your family. That’s why Dr. James D. Frevola and the entire team at our Halesite, New York veterinary practice is committed to providing the highest quality in your pet’s health care. We offer excellent wellness and medical care for dogs and cats including vaccinations, laboratory testing and full diagnostic, surgical, and dental care. We invite you to look around our site to learn more about Harborside Veterinary Hospital and to see how we can be an integral part of your pet's health care. We know the first step towards a healthy and happy pet begins with selecting a Halesite veterinarian that you can rely on and we are honored that you've chosen to partner with us for the care of your pet. We treat all animals as if they were our very own and we're glad to have you as part of our family.


Monday        8:00AM to 5:00PM
Tuesday       8:00AM to 5:00PM
Wednesday  8:00AM to 5:00PM
Thursday      8:00AM to 5:00PM
Friday           8:00AM to 5:00PM
Saturday       8:00AM to 12:00PM

  • Paula and Joe M.
    In May of 1985, when Dr. Frevola opened his new practice in Halesite, our yellow lab puppy Chester was the first patient to walk through the door. Upon meeting Dr. Frevola, we sensed the knowledge, experience and sensitivity of an outstanding veterinarian. Dr. Frevola treated Chester for 11 years. During those years our dear Chester had several bouts of cancer, one of which could have been fatal. Dr. Frevola researched the type of cancer and found an inexpensive treatment which ultimately saved Chester's life.

    We now have five cats and Dr. Frevola remains our veterinarian to this day. When any of our animals are in need, we are on the phone to him. Each year, Dr. Frevola and his competent staff at Harborside care for our pets. After twenty-four years, we still believe Dr. Frevola to be the kindest most competent and knowledgeable vet on Long Island, as well as a good friend.
  • Rebecca B.
    Very good RDVMs. This is the perfect general practice. Experienced technicians. Knowledgable doctors and helpful receptionists.
  • Michele Krause
    I came to know Dr. Frevola and the staff of Harborside Veterinary Hospital through the adoption of my mutt from the pound. He had established a cooperative relationship with the town by spaying and neutering the animals in their care and Penny Lane was one of those dogs. What good fortune that was for me - and for her! Like striking gold! Penny, it turned out, had cancer and bringing her back to him for an examination after her spaying, he diagnosed it and treated her - and cured her. She lived 11 1/2 more years after that, until a different form of cancer took her in her old age, but before it did, Dr. Sponza helped extend Penny's life again with a quick diagnosis and skillful surgery.

    For over 13 years, Harborside's talented and knowledgeable team of veterinarians and veterinary technicians have cared for my beloved animal friends. Their advice has been unfailingly good and their care and treatment of my pets has been impeccable. Even to the smallest details, like when several of the vet techs took the time to groom and brush Penny's thick coat after her final surgery, and even cleaned her teeth - despite knowing she would not be around much longer. Or when Dr. Chen and two of his assistants stayed until after 11 p.m. when my dog Sheba needed emergency surgery. Or the times when I was wrestling with my dog Samsons's imminent demise and stopped by without an appointment needing to talk and found each of the vets willing to take the time needed to advise and reassure me. Or the house calls they made at final, desperate moments when they needed to ease my dog friends from this life that held only pain for them.

    The diagnostic and treatment skill of Drs. Frevola, Chen and Sponza are excellent and they are among the most caring and kindhearted people that I know. Their efforts on behalf of my animals have always impressed me and their knowledge, professionalism and compassion have enabled me to have unfailing confidence in them. Harborside's team of veterinarians and veterinary technicians have provided my pets with solid and dependable medical care over all the years I have known them and they have provided me with helpful, practical advice and guidance on the best way to care for them as my pets and family members. I am indeed very grateful and have recommended them to so many friends, who have then told me that they have also recommended Harborside Veterinary Hospital to their friends. What better endorsement could there be than repeated satisfaction and happiness?
Contact Us

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Harborside Veterinary Hospital
162 New York Ave
Halesite NY 11743
Phone: (631) 549-1540
Email Address