The Department of Internal Medicine consists of three board certified internists and a specialized technical support staff.

Diagnostic services include:

  • Ultrasonography
  • Endoscopic examinations of the upper and lower gastrointestinal tract, the urinary tract and the nasal passages
  • Biopsies

Therapeutic services include:

  • Chemotherapy for selected tumors
  • Radioactive iodine treatment for cats with hyperthyroidism
  • Intravenous nutrition for animals too ill to eat
  • Treatments for Cushing's disease
  • Treatments for Addison's disease
  • Canine hypothyroidism
  • Diabetic Stabilization

Our internists integrate their care with neurology, oncology, cardiology, surgery, and the critical care unit to function as a team in order to provide the best possible medical and surgical care to all of our patients.

Mary Ann Crawford, DVM, DACVIM (Internal Medicine)
Dr. Crawford received her veterinary degree at the Ohio State University College of Veterinary Medicine in 1978. Dr. Crawford is board certified by the American College of Veterinary Internal Medicine. She has been board certified in internal medicine since 1985 and joined the Oradell Animal Hospital staff in 1986. Dr. Crawford was Professor and Head of the Medicine Department at Louisiana State University College of Veterinary Medicine before coming to Oradell Animal Hospital. She is also a past president of the American College of Veterinary Internal Medicine and a past president of the Northern New Jersey Veterinary Medical Association..
Dr. Crawford was awarded "Distinguished Alumnus" from The Ohio State University College of Veterinary Medicine in 1995 and in 2004 "Outstanding Alumnus" from the Animal Medical Center in New York City. She is also the recipient of the 1997 Friskies Pet Care Award for Feline Medicine and Nutrition given for outstanding clinical research in the area of feline hepatic lipidosis.

Dr. Crawford is involved in a number of clinical research projects and acts as a consultant for Antech Diagnostic Laboratories. In her free time she spends time with her family and enjoys biking and swimming.
Dara Zerrenner, VMD, DACVIM (Internal Medicine)
Dr. Zerrenner received her Veterinary degree from the University of Pennsylvania School of Veterinary Medicine. She completed an internship in small animal medicine and surgery at Oradell Animal Hospital and completed her residency in internal medicine at the Animal Medical Center in New York City. Dr. Zerenner is board certified by the American College of Veterinary Internal Medicine.

Her professional interests include endocrinology, gastroenterology and nephrology. She loves spending time with her husband Kieran, daughter Devin and son Ryan. She also loves to travel.
Laura Lee Sartor, DVM, DACVIM (Internal Medicine)
Dr. Sartor graduated from the Atlantic Veterinary College in Prince Edward Island. She completed a rotating internship in small animal medicine and surgery at the Western College of Veterinary Medicine in Saskatchewan and a residency in small animal internal medicine at the University of Wisconsin Veterinary Hospital in Madison.

Dr. Sartor is board certified by the American College of Veterinary Internal Medicine, and is in charge of Oradell Animal Hospital's Nuclear Medicine Program utilizing radioiodine for the treatment of hyperthyroidism in cats. Her special interests also include liver disease, coagulation disorders and anemias.

Dr. Sartor enjoys traveling and shopping.
Deborah Hall, DVM     
Dr. Hall received her DVM degree from the University of Wisconsin-Madison School of Veterinary Medicine. She completed a general internship at Michigan State University College of Veterinary Medicine and completed a residency in internal medicine at Kansas State University College of Veterinary Medicine.

Dr. Hall enjoys travel and dance. She has two dogs, Milo and Marcus.