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.

Our Staff

Patient Care Specialists

Patient Care Specialists

We are fortunate to have dedicated Veterinary Technicians and Veterinary Assistants who are vital members of the AVIM team. These individuals are highly trained in the complexities of Internal Medicine. Akin to a human nurse, veterinary technicians and assistants are adept at a variety of procedures such as safe administration of anesthesia, proper animal handling techniques, use of laboratory equipment to process blood and other tissue samples, assist in endoscopic and other diagnostic procedures, and most of all, impart a lot of love to each patient.

Client Service Representatives

Client Service Rep

From the moment you call or enter our facility, it is the Client Service Representative that will greet you. They will assist you in processing paperwork, explain how we will care for your pet during the examination and consultation, and ensure all of your questions are answered. Similar in nature to a concierge, our CSRs are here to simply help in whatever way they can. Please let us know what we can do to make your visit most comfortable.

Marissa Hepler


Bio Coming Soon.


Missy Manlove, BS, RVT, CVPM

Hospital Administrator

Missy received her BS from UC Davis in 1998 in Avian Sciences (yes, bird science!). After working a few years in both exotic animal and specialty hospitals, she decided to continue on with her education and received her Registered Veterinary Technician (RVT) certification in 2001. Her final certification of Certified Veterinary Practice Manager (CVPM) was achieved in 2017.

She has held multiple positions throughout her many years in the veterinary field, both as a technician and as a manager. Her passion and love of the profession is shown in all of her achievements and AVIM is fortunate to have her as part of our team.

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

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