Animal Specialty Center

Internal Medicine

What is a Veterinary Internal Medicine Specialist?

Like people, animals can develop a variety of illnesses requiring the skilled expertise of a knowledgeable, board-certified internal medicine specialist. At Animal Specialty Center, our board-certified internists have extensive training, including specialized internships and residencies, and must pass rigorous examinations to achieve their certification. Internal medicine specialists are trained to treat the most serious diseases and health problems that affect pets. They are also especially prepared to care for pets that may be facing multiple health problems. Thanks to better health care, more and more pets are living longer lives. As a result, an increasing number of older pets, just like older people, are coping with multiple medical problems that can be very difficult to manage. For example, a cat with diabetes may also be suffering from kidney failure, or a dog in heart failure may also be diagnosed with cancer. Internal medicine specialists are uniquely prepared to oversee the care of these complicated cases. In other situations, a younger animal may develop a problem that used to be considered untreatable but is now manageable and perhaps even curable.

While your general practitioner veterinarian can diagnose and treat many health problems, certain diseases and conditions require the care of a doctor who has had specialized, intensive training in internal medicine in order to provide the very best outcome for your pet. There are approximately 2000 board certified veterinary internal medicine specialists in the United States, and the number is growing.

Our internal medicine specialists have advanced training in the following disciplines:

• Endocrinology (hormonal diseases)
• Cardiology
• Gastroenterology (diseases of the stomach, intestine, liver pancreas)
• Hematology (study of the blood)
• Immunology (diseases of the immune system)
• Infectious Diseases
• Nephrology/Urology (diseases of the kidney and bladder)
• Neurology
• Respiratory Diseases (diseases of the lung)
• Oncology

What Health Problems Does a Veterinary Internal Medicine Specialist Treat?

Following are some common diseases that Veterinary Internal Medicine Specialists often treat:

• Cancer
• Heart Disease
• Gastrointestinal Diseases
• Diabetes Mellitus
• Immune Related Disorders
• Kidney Dysfunction

At Animal Specialty Center, our compassion, our multi-disciplinary team approach and our advanced technology help to ensure the very best care for your pet.

In addition to your internal medicine specialist at Animal Specialty Center, our hospital has a team of specialists, including surgery, oncology, and critical care, as well as a wide range of other specialists, who can assist in the treatment and care of your pet. Animal Specialty Center prides itself on professional leadership, thorough diagnostics, state-of-the-art equipment, exceptional patient care and client service. Our team approach is to emphasize active collaboration within the department and with other specialty services to form a comprehensive plan for diagnosis and treatment. We believe that a strong mix of compassion and competence enhances service to our clients and their pets.

When to consult a Veterinary Internal Medicine Specialist

Just as your own primary care physician may feel the need to refer you to the care of a specialist from time to time, your general practitioner veterinarian may feel your pet needs a specialist to help diagnose or treat a particularly complicated medical problem. While your general practitioner veterinarian can handle many aspects of your pet's care, just as in human medicine, there is sometimes a need for the attention of a specialist..

While in some cases, your veterinarian may be able to simply consult with a specialist about your pet's care, in other cases it is necessary to actually refer you and your pet to the specialist for more advanced diagnostics and treatment. Animal Specialty Center's board certified veterinary internists utilize technologically advanced diagnostic equipment and highly specialized treatment tools that a general practitioner veterinarian may not have. Among others, our diagnostic tests and services include:

• Comprehensive physical examinations
• Endoscopy with high resolution video of the:
      - Upper GI (Gastroduodenoscopy)
      - Lower GI (Colonoscopy)
      - Nose (Rhinoscopy)
      - Lungs (Bronchoscopy)
      - Bladder (Cystoscopy)
• Advanced abdominal ultrasound
• Non-invasive biopsy and aspiration
• Ultrasound-guided techniques
• Feeding tube placement
      - E-tubes
      - PEG tubes
      - J-PEG tubes
• 16-slice CT scans with 3-D imaging
• Fluoroscopy

Animal Specialty Center internists work with you, as pet owner, and also in concert with your family veterinarian, who manages your pet's general well-care, and continually provide him/her with updates regarding your pet's treatment at our facility. For more information about our Internal Medicine Service or to speak with us about your pet, please contact our Internal Medicine Department at 914-457-4000.


Kerry J. Heuter, DVM
Diplomate, American College of Veterinary Internal Medicine
Office Hours
: Monday-Thursday 9am-5pm

Please call 24 hrs in advance during office hours for all medication and food refills.
Dr. Heuter's Service Coordinator is Tiffany Schaadt.

Cherise Willey, DVM (Practice Limited to Internal Medicine)

Office Hours: Wednesday-Saturday, 9am-5pm

Jason Berg, DVM
Diplomate, American College of Internal Medicine (Internal Medicine)(Neurology)

Office Hours: Monday and Friday 9am-5pm, Tues and Thursday 7:15am-12pm, Wednesday 2:30pm-5:30pm, Sunday 9:30am-11:30am

Please call 24 hours in advance during office hours for all medication and food refills.
Dr. Berg's Service Coordinator is Kelly Migliore.

Frequently Asked Questions

What Do I Bring to my Referral Appointment?

Be sure to bring any relevant medical records or information to your first appointment. Ask your veterinarian for copies of any relevant medical tests, imaging studies, x-rays, or laboratory panels.

Remember, you also can do your part to maximize your pet's recovery by keeping your pet's traveling medical records organized and by strictly adhering to the recommendations of your veterinary team for the scheduling of follow up appointments, etc. At every appointment, be sure to write down any important recommendations, or ask the veterinarian or a staff member to write them down for you.

Services Offered in Internal Medicine

Veterinarians in Internal Medicine


General Practice

We have over 600 animal hospitals in 41 states and 4 Canadian provinces that are staffed by more than 3,000 fully-qualified, dedicated and compassionate veterinarians, with more than 400 being board-certified specialists.

The nationwide VCA family of general practice hospitals give your pet the very best in medical care, providing a full range of general medical and surgical services as well as specialized treatments such as wellness, spay/neuter, advanced diagnostic services (MRI/CT Scan), internal medicine, oncology, ophthalmology, dermatology, cardiology, neurology, boarding, and grooming. Services may vary by location.

Our family of pet hospitals stands out by delivering the greatest resources in order provide the highest quality care available for your pets. By maintaining the highest standards of pet health care available anywhere, we emphasize prevention as well as healing. We provide continuing education programs to our doctors and staff and promote the open exchange of professional knowledge and expertise. And finally, we have established a consistent program of procedures and techniques, proven to be the most effective in keeping pets healthy.

Find a VCA General Care Animal Hospital near you:


See all VCA Animal Hospitals >


Emergency Care


TEL: 914-457-4000

Click here for directions to our location.

Animal Specialty Center is a fully-equipped 24/7/365 emergency hospital serving communities in and surrounding lower Westchester. If you suspect your pet may be having a medical crisis, we have a staff of top veterinarians, technicians and client care specialists prepared to handle all pet medical emergencies.

Our Emergency and Critical Care units can assist in all of the following situations requiring immediate medical attention: Auto accidents, traumatic injuries (fractures, bites, burns, lacerations, wounds), respiratory emergencies (choking, difficulty breathing), vomiting, diarrhea, difficulty urinating/defecating, shock, loss of consciousness, dizziness, staggering, tremors, seizures, paralysis, toxic reactions, poison ingestion, labor and delivery problems, blood in urine or feces, swollen, hard, painful abdomen, heatstroke.