Our Hospital remains open 24 hours a day for your pet’s needs. During this difficult time in our community the first priority is the health and safety of your families and ours while providing excellent care to meet your pet’s medical needs. We have instituted new hospital protocols based upon CDC recommendations. Please give us a call if you need any assistance.  Stay Healthy and Stay Safe.

About AVIM

Internal Medicine Is Our Specialty

Each one of us has a story behind the motivation to embark on this wonderful profession. After training for four years in vet school, we still hungered to be able to do more for our companion animals and were intrigued by some of the most complex cases. Thus, we pursued deeper knowledge, specifically in Internal Medicine, and continue to do so regularly. A chronic or recurring illness or disease can be frustrating, difficult to stabilize or manage long-term, or even to definitively diagnose. That’s where we come in.


What is Internal Medicine?

Internal Medicine is what we are passionate about. It is our calling and we believe that is what it takes to be able to provide answers and appropriate care for our companion animals to help them achieve long, healthy and happy lives!

We have also added a boarded specialist in critical care and emergency to our staff who is available to help your pet through any crisis that they may be experiencing. Internal medicine and emergency/ critical care always go hand in hand and we believe this new facet will even better assist you in the long term care of your pet.


What’s the Difference Between an Internist and an Intern?

Internists are veterinarians who have completed an internship (professional learning experience), along with an additional three year Internal Medicine- focused residency, have published a paper in a peer-reviewed journal and have passed a rigorous exam called “Boards.” Internists, therefore, are board-certified specialists in internal medicine.

We are extremely fortunate to have amazing doctors on staff.  Dr. Cindy Duesberg, DVM, DACVIM, Dr. Victoria Vorathavorn, DVM, DACVIM, Dr. Jackie Short, DVM, DACVECC, Dr. Laura Najman, DVM, DACVECC, are all boarded specialists on our team as well as Dr. Kerrie Chung, DVM and Dr. Michelle Cieplucha, DVM who have both completed an Internal Medicine residency and have over 25 years specifically working in Internal Medicine.


AVIM Inside The Advanced Veterinary Specialty Group Building

AVIM Inside The Advanced Veterinary Specialty Group Building

Just left of the metro station
We're Open 24/7

We're Open 24/7

With the partnership of AVSG after hours | Pet Emergency your pet can be seen by our specialists any time of day.
Our Reception Desk

Our Reception Desk

Please walk in the front doors and check in at the 1st desk on the left.
Pet Exam

Pet Exam

Our specialists have a combined 50 + years of experience in Internal Medicine
In House Diagnostic Imaging

In House Diagnostic Imaging

Providing in house diagnostic imaging and procedures helps us take a more proactive approach to diagnosing and treating your pet.


Advanced Veterinary Internal Medicine
2965 Edinger Ave.
Tustin, CA 92780

Business Hours

8 AM - 6 PM

Contact Us

Phone +
Fax +
Email +
This email address is being protected from spambots. You need JavaScript enabled to view it.

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.