Guillermo Couto, DVM, DACVIM
Guillermo Couto, DVM, DACVIMOncology & Internal Medicine Specialist - Columbus, OH
Guillermo Couto graduated from Buenos Aires University, Argentina in 1976. He spent 5 years as a private practice small animal practitioner, and then completed a Clinical Oncology Residency at the University of California-Davis.
He is Board-Certified by the ACVIM in both Internal Medicine and Oncology, and is coauthor of the textbook Small Animal Internal Medicine; he has over 300 publications in the areas of oncology, hematology, and Greyhound medicine. After 30 years in academia, he is now providing consultation and educational services through Couto Veterinary Consultants.


Cancer can be scary, but it is less scary when you understand the options for your pet. With VetNOW, the goal of our veterinary oncology services is to reach a definitive diagnosis as efficiently as possible. We want to then educate you on the disease process and the treatment options that are available, so that we can jointly advocate for your pet and determine the best course of action.

With more pet cancer treatment options than ever before, you want to have an veterinary oncology specialist that knows the field well.  Dr. Guillermo Couto, is a world-renowned expert in veterinary oncology. He travels the world lecturing to veterinarians on exactly this subject. After he spent 30+ years at The Ohio State College of Veterinary Medicine, we are extremely fortunate to have Dr. Couto as a part of the VetNOW team. Dr. Couto makes it easy to talk about the disease processes, treatment options, and discuss what is best for his patients.