Since veterinary medicine is a dynamic science, our staff and veterinarians are constantly working to build on their expertise and knowledge base for the benefit of your best friends. You can rest assured that when you walk through our doors, your pet’s needs will be met with skill, as well as genuine compassion and tenderness.
Dr. Matthew Steinberg
A native Long Islander, Dr. Steinberg grew up on the North Shore of Nassau County in Roslyn, N.Y. He spent his summers riding horses and teaching, and has always had an affinity for animals and nature. Dr. Steinberg graduated from Tufts University School of Veterinary Medicine in 2005. Following veterinary school, he completed a rotating small animal surgery and medicine internship at the Animal Medical Center in New York City and spent the following year as an emergency veterinarian in New York City. Dr. Steinberg is grateful for having the privilege of practicing alongside several outstanding veterinary specialists over the years.
In 2010, Dr. Steinberg moved back to Long Island from NYC to continue practicing exceptional veterinary medicine. His focus is on general practice combined with a keen understanding of a pet’s emotional needs as well as their medical ones, and he prioritizes the ability to communicate effectively with pet parents. He continues to focus on and teach the value of working with pet owners to improve their pet’s lives. His special interests in veterinary medicine include neurology, emergency medicine, and being the bridge between owners and pets.
Our office is home to four cats (Mario, Betty, Stanley, and Sabrina) and our beloved office tortoise named Torti. Dr. Steinberg has a second zoo of animals at home, with another four cats and two dogs! Aussiedoodle Lily, Cavapoo Sandy, and cats Salt, Pepper, Millie, and Puck. When Dr. Steinberg is not working, you can probably find him running, hiking, and going to hockey games. Most importantly, Dr. Steinberg enjoys spending as much time with his family as possible.
Dr. Hayley Knopf
Sometimes we feel helpless. Helpless in knowing where our pet might be hurting, why our older dog may be slowing down, what the best plan for our new puppy or kitten is, why our pet won’t eat, if they are sick, or whether that bump is concerning. Is a certain behavior normal, or could it be a sign of a deeper health issue? There can be so many questions. This is where my passion lies. To be able to provide you with answers, so your best friend can live a happy and healthy life, and be by your side for as long as possible.
Dr. Hayley Knopf grew up in Northport, NY on the north shore of Long Island. She started her career helping animals as a licensed veterinary technician, and quickly developed a passion for medicine and surgery. She obtained her Bachelor’s degree from Dowling College, then moved to the beautiful island of St. Kitts and Nevis to attend Ross University School of Veterinary Medicine. After finishing her clinical year at Oklahoma State University, she graduated with a Doctor of Veterinary Medicine degree in 2016. Dr. Knopf enjoys reading, cooking, and spending time with friends and family. She currently lives with her husband, and Olde English Bulldogge, Bugsy.
Dr. Mia Cosentino
Dr. Cosentino was born and raised in New York. Her love and compassion for animals began when she was a child and inspired her summer volunteer jobs, travel, and academic career. Dr. Cosentino graduated from the University of Vermont with a Bachelor of Science degree as an Animal Science major. She then went onto receive her Doctorate in Veterinary Medicine from the University of Pennsylvania.
Dr. Cosentino has two Pit mixes, Luna and Milo, and two cats Bean and Franklin. She has a soft spot for senior animals, and it so happens that any who cross her path get quickly added to her family. In her spare time, she enjoys getting outside with her pets, taking care of her nieces, traveling and spending time with her family and friends.
Dr. Nicholas Menna
A native Long Islander, Dr. Nicholas Menna grew up on the north shore, and is proud to serve the community he calls home. He earned his Doctor of Veterinary Medicine degree from Long Island University College of Veterinary Medicine in 2025, after completing his undergraduate studies in chemistry at St. Joseph’s University in 2021.
Dr. Menna has a special interest in soft tissue surgery and emergency medicine. He began his career during vet school as a technician in a surgical referral center where he gained valuable experience in advanced surgical procedures and perioperative care. This hands-on training has equipped him with a broad depth of surgical understanding that he brings to his daily practice
He is passionate about the human-animal bond and finds great fulfillment in helping pet owners better understand and care for their companions. He is known for his approachable communication style and takes pride in educating clients to support long-term wellness for their pets.
Outside the clinic, Dr. Menna is a competitive CrossFit athlete and coach, as well as an avid runner. He also enjoys traveling, cooking and spending time with his beloved pets—three dogs and two cats—who keep him on his toes and constantly inspired
Donna
Licensed Veterinary Technician
Donna’s love for animals started when she was very young. While in high school, Donna decided to study to become a veterinary technician. She went to Farmingdale State College and graduated in 1992. Donna has two beautiful children, Michael and Olivia. She also has two dogs, a rabbit, and a carnival goldfish from 2019!!
Francesca
Licensed Veterinary Technician
Francesca is a veterinary technician that graduated from Suffolk County Community College in May 2021. Francesca started here in Dec 2015 and has always loved her job here. She loves all animals, but especially exotics and birds! Francesca’s zoo is filled with dogs, rats, birds, rabbit, guinea pig and an axolotl. She is very happy to be part of the family at our practice!
Nicole
Practice Coordinator
Nicole has been an attendant here at Commack Veterinary Center since 2018. She graduated Mercy College with a bachelor’s in science with hopes of continuing to vet school one day. She has had a passion for animals ever since she was little, and her favorite breed is Golden Retrievers. She has 3 dogs Roman, Dexter, and Tessie.
Client Service Representative
Kelly
Client Services Representative / Veterinary Assistant
Kelly is one of our CSR and Veterinary Assistants. She has always had a passion for animals. She hopes to become a Veterinary Technician in the future. In her free time she likes to go on adventures with her fur babies. Kelly has 2 dogs, Charlie and Poe and a cat, Cassius.
Amanda
Client Services Representative
Ashleigh
Client Services Representative / Veterinary Assistant
Talia
Client Services Representative
Bio coming soon.
Veterinary Assistant
Natasha
Veterinary Assistant
Natasha is one of our Veterinary Assistants who joined our team in 2022. She is looking forward to a career as a Veterinary Technician. She finds emergency medicine interesting and enjoys all German Shepherds. Natasha has a German Shepherd, Juno, a Persian, Wednesday and 2 Rabbits, Twix and Hedgehog. In her free time she likes to sleep and take Juno on adventures.
Janel
Veterinary Assistant
Janel joined our team as a Veterinary Assistant in 2023. She has been in the field since 2020 and is a licensed Cosmetologist for 10 years. Her favorite part of CVC is giving love to all the babies and the joy that the patients bring to her no matter the type of day. Janel is currently at Farmingdale State College finishing her undergrad with the dream of becoming a Veterinarian. Janel has a puggle,Coby and a mini shih tzu, Teddy. In her free time she likes to binge watch TV shows and try out new restaurants.
Kayla
Veterinary Assistant
Bio coming soon.
Brianna
Veterinary Assistant
Bio coming soon.
Jia Ying
Veterinary Assistant
Bio coming soon.
