Companions Animal Hospital

Is this your veterinarian?

1798 Merrick Rd
Merrick, NY 11566

Driving Directions

(516) 431-1133


  • Hours:
  • M
  • W
  • Th
  • F: 9AM-6PM
  • Tue: 9AM-8PM
  • Sat: 9AM-12PM
  • The hospital is closed weekdays between 1-2pm
  • for lunch and Hosp rounds.

Companions Animal Hospital is dedicated to enriching and prolonging the bond you share with your animal companions.  We believe excellent veterinary care, in conjunction with thorough communication and education, allows our companions to live longer, healthier and happier lives. Our medical, diagnostic, treatment and preventative plans will be specifically tailored to the needs of you and your companion.

Companions Animal Hospital is women owned.

Our Doctors
Dr. Klemenger and Dr. Marghoob met during orientation at Cornell University College of Veterinary Medicine. They quickly became friends and study partners, and learned that they shared the same philosophy on the importance of the human-animal bond, the role animals play in our lives, and the type of practice they planned to create one day. The dream of Companions Animal Hospital began then. The opening of Companions Animal Hospital was the culmination of years of gaining experience, learning, planning, and dreaming. It has taken a long time, but they are now proud that they have created the hospital where they would want their own beloved pets to be treated. Since the grand opening of Companions Animal Hospital in June 2006, the hospital has been honored to receive commendations and awards from the community. Companions Animal Hospital was recognized by Animal Haven shelter in 2008 with the “Florence Brenner Award for honoring the commitment to helping homeless animals.” Companions Animal Hospital also received the highest community honor of “Merrick Professional of the Year” in 2008.

Companions Animal Hospital Services

  • Behavioral Medicine
  • Complementary Medicine
  • Dental Care
  • Fully Stocked Pharmacy
  • Hospice and Euthanasia Services
  • Microchipping
  • Nutritional Counseling
  • Pain Management
  • Parasite Prevention and Control
  • Puppy and Kitten Care
  • Rabbits and Small Mammals
  • Radiology (X-Rays)
  • Senior Care
  • Surgery
  • Ultrasound
  • Vaccinations
  • Wellness Exams

Companions Animal Hospital Staff Profiles

Andrea McCarthy

Social Media Coordinator
Andrea joined the staff at Companions in 2007 as a Client Care Coordinator.  She had a 25 year career in the human medical field, where she was a clinical laboratory technologist.  During this time she also raised her family, 2 daughters named Jessica and Samantha, and a son Michael

After retirement, she decided she wanted to work with animals.   She has a very caring way about her, and is very good at easing the worried pet owner, whether it is on the phone or in the waiting room.  Her medical knowledge is also very helpful. 

 Andrea  now runs our facebook page and website. She also assists our Doctors and Irene with other administrative duties. In her free time Andrea loves to travel with her husband when she isn't helping out with her grandchildren.

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C.W. Post

Jessie Seifert

Jessie joined the staff of Companions Animal Hospital in 2006.   She had taken a semester off from her rigorous college studies to re-focus and find out if the veterinary field was for her.  Needless to say, she changed her major from engineering to biological sciences.  Jessie is now a proud graduate of Dartmouth College, and joined us full-time after her graduation in 2008.  Jessie is in the process of  attending LSU School of Veterinary Medicine to become a Veterinarian. She is a gifted and compassionate veterinary student, assistant and nurse, and has a special place in her heart for the often misunderstood pit bull.  She has also nursed and fostered countless puppies and kittens in her home.

She currently shares her home with one pit bull, Ripper, and 7 rescued cats, Mowgli, Ziggy, Zita, Marbles, Gromit, Tigger and Phantom.
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Dartmouth College/LSU School of Veterinary Medicine

Deborah Lupo-Lyons, DVM

Dr. Lyons graduated from the Ross University College of Veterinary Medicine in 2006 after years of working as a veterinary technician, preparing herself for the rewarding call of veterinary studies. She finished her clinical training at Cornell. Dr. Lyons has spent much of her time as a veterinarian as an emergency and clinical care doctor, as well helping out at shelters. She also devotes much of her time to a feral trap-neuter-release cat program. Dr. Lyons has always loved animals and loves what she does.

Dr. Lyons shares her home with a rescue cat from Saint Kitts named Tilt, a barn cat named Simone, and a rescued chocolate lab mix named Yogi. Aside from veterinary medicine, Dr. Lyons spends her time gardening, playing pool, bonding with her family, and working on home improvement projects. She hopes to one day travel the world.
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Ross University, College of Veterinary Medicine