+1 (909) 218-8288


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+1 (571) 323-6917

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Established in 2005, Animal Dermatology Clinic – Ontario specializes in the advancement of veterinary dermatology offering the latest in diagnostics to helped identify and manage a variety of skin diseases, allergies and chronic ear infections. Our board certified dermatologists strive to help pet owners become informed decision makers and fully understand the dermatological issues their pets face. Treatment plans are tailored to maintain control and improve the quality of your pet’s life. As specialists in the field of veterinary dermatology, we are dedicated to providing excellent care and are committed to the highest standards for treatment of your pet’s skin and/or ear diseases. Some of the services provided include intradermal allergy testing, video otoscopy and CO2 laser surgeries.

Whether your pet suffers from chronic itching, persistent skin infections, hair loss or ear disease, we can help. We are proud to serve the surrounding areas of Ontario, Palm Desert and Murrieta and appreciate that you’ve trusted us as your pet’s dermatology specialist.

We look forward to seeing you at our full time location at 2409 S. Vineyard Ave. Suite M, Ontario, California 91761.

Practice Hours

Monday: 9:00 am to 5:00 pm

Tuesday: 9:00 am to 5:00 pm

Wednesday: 9:00 am to 5:00 pm

Thursday: 8:00 am to 5:00 pm

Friday: 9:00 am to 5:00 pm

Saturday & Sunday: Closed

Our Doctors

Colleen Mendelsohn, DVM

Diplomate, American College of Veterinary Dermatology

Megan Frazer, DVM

Diplomate, American College of Veterinary Dermatology

Andrew Wirkkala, BVM BVS

Resident, American College of Veterinary Dermatology

Team Members

Nicole R

Senior Practice Manager, Registered Veterinary Technician, Certified Hyperbaric Technician

Paul C

Practice Supervisor

Kimberly F

Registered Veterinary Technician

Catalina G

Veterinary Assistant

Monique L

Veterinary Assistant

Christine S