Ann E. Hohenhaus DVM, DACVIM (SAIM, Oncology)

Staff Doctor

Certified Veterinary JournalistDr. Ann Hohenhaus is a third generation veterinarian with an extensive background and expertise in veterinary medicine, including two specialty board certifications. She received a BS in Natural Science from St. Mary's College of Maryland, with honors, Phi Beta Kappa in 1981 and her DVM degree from Cornell University in 1985. She has achieved board certification in both Oncology and Small Animal Internal Medicine by the American College of Veterinary Internal Medicine. In 2014, Dr. Hohenhaus was honored by the Foundation for Biomedical Research with a Michael E. DeBakey Award for Excellence in Journalism for her article promoting the use of pet dogs in biomedical research entitled “Dogs Go To Bat Against Lou Gehrig’s Disease.” Also in 2014, Dr. Hohenhaus was selected to join the American Veterinary Medical Association’s Council on Education, the body which accredits veterinary colleges both nationally and internationally. Previously she served on the American Veterinary Medical Association’s Council on Research. Her professional memberships include the American Veterinary Medical Association, Veterinary Cancer Society, American Society of Veterinary Journalists and the Veterinary Hematology and Transfusion Medicine Association. 

She has continuously practiced clinical veterinary medicine, almost exclusively at The Animal Medical Center and has contributed to all facets of its tripartite mission of clinical service, research and teaching. In her AMC clinical practice, Dr. Hohenhaus provides primary care to long-term patients and specialty care to pets with cancer and blood disorders. Her medical philosophy when treating cancer in pets is to use multimodality therapy to control tumor symptoms while improving the quality and quantity of life for dog and cat cancer patients. 

In addition to her clinical practice at The AMC, Dr. Hohenhaus serves as the hospital’s spokesperson and is frequently called upon by national media outlets to discuss timely and relevant issues related to veterinary medicine.  Furthermore, she writes a pet owner educational blog for The AMC and at From October 2010 to February 2013, she served as an AVMA expert and blogger in the WebMD Healthy Pets Community. Dr. Hohenhaus has also created content for nationally recognized publications such as Ladies' Home Journal and Real Simple magazine.  

Dr. Hohenhaus is an active participant in The AMC’s continuing education programs for graduate veterinarians and has also served as a speaker at national and international continuing education programs, including seven times at the ACVIM Forum and five times at the North American Veterinary Conference. She was an invited speaker in 2014 at Oncologisch Treffen in the Netherlands and at the World Small Animal Association in Cape Town, South Africa.  

Dr. Hohenhaus has written extensively on oncology and transfusion medicine and since 2000, she is listed as an author on 31 publications by Pub Med, for clinical research conducted on dogs and cats with spontaneously occurring diseases including: mast cell tumors, melanoma, osteosarcoma, exocrine pancreatic insufficiency and anemia. Currently, she has two manuscripts in press. During the same time period, she also authored sixteen textbook chapters in veterinary textbooks. Working with dozens of interns and residents in training at The AMC, Dr. Hohenhaus has had the privilege to advise young veterinarians on their career pathway, mentoring seven of them to award winning research projects.  

Board Certifications

  • Diplomate, American College of Veterinary Internal Medicine (Oncology), 1991
  • Diplomate, American College of Veterinary Internal Medicine (Small Animal Internal Medicine), 1995


  • BS - St. Mary's College of Maryland, St. Mary's City, MD, 1981, with honors, Phi Beta Kappa
  • DVM - Cornell University, Ithaca, NY, 1985

Recent Publications

  • Verrilli AM, Hohenhaus AE, DVM, Le Roux AE, Donovan TA.  What’s your diagnosis? Diaphragmatic hernia in a cat with transitional cell carcinoma.  J Am Vet Med Assoc, in press.
  • Hohenhaus A, Kelsey J, Haddad J, Barber L, Palmisano M, Farrelly J, Soucy A.  Canine cutaneous and subcutaneous soft tissue sarcoma:  Evidence based review.  J Am Anim Hosp Assoc, in press.
  • Feline exocrine pancreatic insufficiency: 16 cases (1992-2007) Thompson KA, Parnell, NK, HohenhausAE, et al. J Feline Med Surg 2009 June 23 epub ahead of print.
  • Hohenhaus A. Neoplastic conditions of the esophagus. In: Steiner J (Ed). Small Animal Gastroenterology. Schlutersche, Hanover, 2008, pp 151-153.
  • Hohenhaus A. Neoplastic conditions of the stomach. In: Steiner J (Ed). Small Animal Gastroenterology. Schlutersche, Hanover, 2008, pp 176179.
  • Dobson J, Hohenhaus A, Peaston A. Cancer chemotherapy. In: Maddison J, Page R, Church D (Eds). Small Animal Clinical Pharmacology, Saunders Elsevier, Edinburgh, 2nd edition. 2008, pp 330-366
  • White CR, Hohenhaus AE, Kelsey J. Canine cutaneous mast cell tumors: Associations with sex, neuter status, and breed. J Vet Int Med 2008;22:705
  • DiResta GR, Aiken SW, Brown HK, Bergman PJ, Hohenhaus A, Healey JH. Influence of carboplatin infusion on osteosarcoma blood flow. Cancer Chemother Pharmacol. 2008;62:545-9.
  • DiResta GR, Aiken SW, Brown HK, Bergman PJ, Hohenhaus A, Ehrhart EJ, Baer K, Healey JH. Use of an artificial lymphatic system during carboplatin infusion to improve canine osteosarcoma blood flow and clinical response. Ann Surg Oncol. 2007;14:2411-21.
Dr. Ann Hohenhaus

Make an Appointment

(212) 838-7053