Animal Hospital
Quality Care
Dedicated staff
Conveniently located

Hours of Operation:

Monday: 8:30 a.m.-7 p.m.
Tuesday: 8:30 a.m.-7 p.m.
Wednesday: 8:30 a.m.-5 p.m.
Thursday: 8:30 a.m.-7 p.m.
Friday: 8:30 a.m.-7 p.m.
Saturday: 8:30 a.m.-2 p.m.
Sunday: Closed


Who We Are

Countryside Animal Hospital is located in the beautiful village of Port Jefferson, New York.   Founded in 1947 by Dr. Joseph Arnibaldi, the Countryside Animal Hospital has been proudly serving the community for more than 65 years.  Dr. Matthew Kearns and his staff strive to provide the most comprehensive and compassionate care for your pet.  We are a highly invested and passionate practice with service in medical, emergency, and surgical care.  Our primary focus is to offer an experienced, empathetic, and welcoming environment.

The Countryside Animal Hospital utilizes the most modern diagnostic and assessment tools available.  This includes a digital X-ray machine, ultrasound, inhouse laboratory/surgical wing, and friendly environment for all your pet’s needs.

Our doctors and staff are actively engaged in community organizations, providing education and advocacy for all pets, both big and small.  Dr. Kearns regularly assists the Suffolk County SPCA in abuse cases and participates in the Comsewogue School District career days.  All of the team members at Countryside Animal Hospital own pets and consider them a part of their families.  We wish to extend that bond to all pet owners that pass through our doors.