Dr. Brian Silvis

Dr. Brian is the Medical Director of Allegheny North Veterinary Hospital, Tender Touch Veterinary Hospital (Wexford), and Pets in Harmony Veterinary Hospital (Zelienople).

After completing his B.S. in Biology at Westminster College, Dr. Brian earned his Doctorate of Veterinary Medicine from Ohio State University in 1999. He worked in Erie, PA after graduation and helped found an emergency veterinary clinic before moving to Pittsburgh.

Dr. Brian's family includes his wife, Kate (a professor at LaRoche College) and two beautiful children, Phillip and Clara. He enjoys spending time with his family, attending baseball games, rooting for OSU, and playing video games.

The Silvis home also includes a furry family of two Pugs (Floyd & Forest) and two cats (Tigger & Siamese rescue Lilly).

Dr. Lisa Macom

Dr. Lisa completed her B.S. in Biology at Gannon University in Erie, PA before earning her Veterinary Medical Doctorate from the University of Pennsylvania. She has practiced veterinary medicine for over 30 years, and has been with us here at Allegheny North Veterinary Hospital since 2001.

She appreciates the bond formed with her clients and their pets. Dr. Lisa especially enjoys seeing new puppies and kittens and providing lifelong care into their geriatric years.

In her free time, Dr. Lisa enjoys hiking, reading, the beach, and baking. Her family includes her husband James (who is also a Pittsburgh veterinarian) and their two cats, Jelly & Pickles.

Dr. Nathaniel Gaiser

Dr. Gaiser also serves as Medical Director. He earned his B.S. in Biology from Penn State Erie, the Behrend College in 2004 and his M.S. in Biology from Clarion University in 2005 before completing his Doctorate of Veterinary Medicine at Ross University in 2009.

Dr. Gaiser has been working with us at Allegheny North since 2012. Passionate about his work, his favorite aspect of veterinary medicine is focusing on ultrasounds, surgeries, and chemotherapy treatments. Of ANVH, he says, "We have great clients and a great team. I enjoy working to help our clients keep their pets as healthy as possible and helping those pets recover when sick or hurt. Our team's knowledge and experience are essential to the practice and I enjoy working with them all."

His free time is spent enjoying family time with his wife, Kasey and their 3 children, biking, golfing, and hiking. He is an avid Pittsburgh Penguins and Steelers fan. The Gaisers share their home with a lovely cat named Tiger Lily.

Dr. Natalie Liebold

Bio Coming Soon

Dr. Carolee Switalkski

Bio coming soon

Dr. Nikita Ahuja

Bio coming soon