Colleen Tansey, DVM, DACVIM (Oncology)

Colleen Tansey, DVM, DACVIM (Oncology)

Doctor of Veterinary Medicine

Specialty: Oncology

Education: Western University of Health Sciences

Availability: Monday, Tuesday, Wednesday, Thursday, Friday

Originally from Chicago, Dr. Tansey received her veterinary degree from Western University of Health Sciences and completed a small animal rotating internship and residency in oncology at Southern California Veterinary Specialty Hospital in Irvine California. She also completed a year long fellowship at California Veterinary Specialists in Southern California. Dr. Tansey has successfully completed her specialty board exams and joins our staff in an effort to provide the best possible care to your patients. Dr. Tansey’s professional interests include feline medicine, paraneoplastic syndromes, and cancers affecting wildlife and marine mammals. In her free time Dr. Tansey enjoys reading, listening to Irish music, and spending time with her husband Mark.



  • Oncologic staging, evaluation, and management
  • Advanced chemotherapy
  • Pain management
  • Bone marrow aspiration
  • Invasive/non-invasive biopsy collection
  • In house cytology
  • Clinical trials
  • Homeopathic treatment options