Our passion is animals

We See Dogs, Cats, Birds & Exotics

Two Convenient Locations
Trusted by Long Island Pet Owners

We have no robots or AI, but if you want to talk to a human, call (516) 621-4010. We’re available 24/7/365.

Roslyn-Greenvale Veterinary Group, Greenvale, NY
Greenvale, NY

Roslyn-Greenvale Veterinary Group

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Merrick Veterinary Group, Merrick, NY
Merrick, NY

Merrick Veterinary Group

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OPEN 7 Days
A Week
Serving Long Island Since 1980
45+ Years of Caring
for Your Pets

Roslyn-Greenvale Veterinary Group and Merrick Veterinary Group are a companion animal and exotic medicine practice committed to providing the best possible veterinary medical care for your pets. Our high-quality healthcare services are designed to help your pet live a longer, happier, and healthier life.

Our compassionate and caring staff understands that your pet is a member of your family — and we will do our best to treat your pet like we would our own.

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Accredited & Trusted
Care You Can Count On

USDA Accredited

Dr. Brian Marder is USDA accredited, so we can issue the health certificates required for interstate and international pet travel.

Pet Boarding & Grooming

Your pet deserves loving care around the clock. Our team is here 24/7 to make sure your pet feels safe, comfortable, and cared for.

Qualified Experts
Meet Our Veterinarians

Our doctors share decades of combined experience and a genuine love for every animal,
from puppies and kittens to parrots and tortoises.

Dr. Brian Marder

DVM · Founder

Dr. Jonathan E. May

DVM · Founder

Dr. Allison H. Villa

DVM · Internal Medicine & Surgery

The Standard We Are Trying to Meet
What Our Clients Say

Independent Reviews from Google

★ ★ ★ ★ ★

— Roslyn-Greenvale —

“Truly the best of the best!”

— Cori B., Long-Time Client

— Merrick —

“Simply the best vet in town!”

— Ramez H., Long-Time Client

— Roslyn-Greenvale —

“The best on Long Island, period.”

— Vanessa R.

— Roslyn-Greenvale —

“They treat your pet like their own family.”

— Adam M.

— Roslyn-Greenvale —

“30 years and I’d never go anywhere else.”

— Anne A.

— Merrick —

“Best boarding and surgeons, hands down.”

— Ramez H.

Full Service Veterinarian
Services Spotlight.
Annual Exam and Preventative Care

Annual Exam and Preventative Care

Annual and biannual wellness exams, vaccinations, preventive medications, and senior wellness programs.

Surgical Services

Surgical Services

From routine spay & neuter to advanced soft tissue procedures, expert surgical care with the compassion your pet deserves.

Avian & Exotic Care

Avian & Exotic Care

pecialized medicine for birds, reptiles, rabbits, and other exotic pets. One of the few practices on Long Island with true avian surgery capabilities.

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