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Dr. Maria Di Gregorio

Dr. Di Gregorio is a native of Upstate New York, where (contrary to popular belief) every pick up truck has a cowboy in the cab and an Aussie in the bed. A graduate of Cornell University's Animal Science program and Oklahoma State University's Veterinary School, Dr. Maria obtained a Master of Arts in Teaching, also from Cornell University. After purchasing Cleveland Veterinary Clinic in Cleveland, OK in 1995, she bought Baker Animal Clinic in Stillwater, OK in 1999. Dr. Di Gregorio continues to own and operate both clinics. She is married to Dr Joseph McCann, PhD., who is an endocrinology consultant and professor at the OSU veterinary school. Dr. Di Gregorio believes in preventive care for her patients and keeping the owners involved and proactive in their pet's health. When she's not busy working she enjoys spending  time with her two teenage daughters and husband, her horses and dogs.

Daisy Brisbin

I was born and raised in West Virginia and moved to Pawhuska, OK in the mid-80's. I have been living in Cleveland since 1998 when I married my husband, Mark. We have 2 grown children, a daughter and son. In September 2013 we were blessed with a sweet grandson named Bentley. We also have a German Shepherd, Bridget, a golden retiever, Darcy, and 9 cats! I started wroking at Cleveland Veterinary Clinic in October 2009. I really enjoy the day-to-day happenings at the clinic and being able to experience something new every day. 

Marilyn Flaherty

I am the receptionist for Cleveland Veterinary Clinic. I enjoy interacting with all the animls that we see at the clinic, and helping the owners undesrtand and deal with the care of their animals. I am a hobby breeder of small dogs. I enjoy antiquing and going to estate sales. I have been at Cleveland Veterinary Clinic for three years. I have three children and four grandsons.

Cleveland Veterinary Clinic


  • Pet Wellness/Vaccinations
  • Surgery
  • Dentistry
  • In-House Laboratory
  • Heartworm Counselling
  • Flea - Tick Control
  • Livestock Management Programs

​Focused on the Human - Animal Bond

THIS ---->https://clevelandvetcliniccom.vetmatrixbase.com/meet-our-team.html

Office Hours

Monday8am - 12pm1pm - 5pm
Tuesday8am - 12pm1pm - 5pm
Wednesday8am - 12pm1pm - 5pm
Thursday8am - 12pm1pm - 5pm
Friday8am - 12pm1pm - 5pm
Saturday8am - 12pmClosed
Day Morning Afternoon
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
8am - 12pm 8am - 12pm 8am - 12pm 8am - 12pm 8am - 12pm 8am - 12pm Closed
1pm - 5pm 1pm - 5pm 1pm - 5pm 1pm - 5pm 1pm - 5pm Closed Closed

Emergency Services Available


We have been using Cleveland Vet Clinic for over 15 years and have always been impressed. Dr. Maria always goes above and beyond to ensure our pets and livestock are given the care they need.

Michaele Weaver
Cleveland, OK

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