Katherine Warren, Hospital Director

Katherine Warren has been with Animal Specialty Center since 2010. That same year she graduated with honors from Mercy College with a Bachelor of Science Degree, specializing in pre-veterinary medicine. She started as an LVT in Neurology and ICU, but soon realized that Oncology oncology and ER were where she wanted to focus her efforts and expand her expertise. After going through chemo with her own pets and eventually losing 5 pets to cancer, she felt she had something extra special to give to the cancer patients and their families and decided to make a home in Oncology. Originally planning on using her tech role as a stepping stone to becoming a veterinarian, Kathy, through working closely with Oncology patients and their families, began to feel the impact that she was having in the department and began to embrace the role. During this time she was promoted to Oncology Supervisor then Technician Supervisor, both roles where she could help her fellow technicians learn the vital skills that she had developed along the way. Always one to step up to a challenge, Kathy has now taken on the role of Hospital Director, where she hopes to continue to help others and to lead by example.

In Katherine’s spare time she shares her home with her 5 cats and 1 dog, each of which has their own medical challenges. Kathy has an adventurous spirit as well and enjoys extreme sports such as bungee jumping and skydiving, with her most recent adventure taking her zip-lining on the tallest and longest line at Hunter Mountain.

Joseph Chiapperini, Referral Manager

Joseph Chiapperini

Joseph Chiapperini is the Referral Manager here at the Animal Specialty Center. As the Referral Manager, Joe works hard to maintain and strengthen the relationships between ASC and our amazing referral community. Joe has been at ASC since 2010, first as a CCS, then as the Surgery Coordinator for many years before stepping into the role of Referral Manager. Working with the clients, veterinarians and local communities, Joe informs people about our distinguished hospital, the incomparable medicine we practice, and the prominent doctors and staff who help make it such a special place.

Joe has many interests and hobbies, including cooking, hiking with his Husky Brodie, writing and traveling.

Marion Kastner, Hospital Administrator

Marion Kastner is the Hospital Administrator with Animal Specialty Center in Yonkers, New York. She joined ASC in 2007 to help plan and set up ASC’s accounting systems when the hospital was still in its pre-opening construction phase. Almost 10 years later and it is hard to imagine the hospital without her guidance and endless support, as she has become the backbone of our facility and culture. Not only does Marion work closely with the management team to achieve the hospital's mission but also with employees, clients, vendors, and, among others. After receiving her Bachelors of Business Administration in Accounting and Information Systems at Pace University in Pleasantville, NY, Marion worked in accounting in both the public and private sectors. This experience, coupled with time in retail early on, has greatly contributed to her ability to work efficiently in a broad range of industries.

While not at work, Marion enjoys spending time with her family and friends, singing at karaoke bars and working on her family tree.

Specialty Services

ASC is a full-service hospital offering 24/7 emergency care, critical care, physical rehabilitation, internal medicine, neurology, medical oncology, radiation oncology, surgery and acupuncture in Yonkers, NY. 

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