Client Info

Here you'll find everything you need about Callahan Drive Animal Hospital and how we can help you.  We have online forms for everything related to our Knoxville veterinarian clinic, and information, including a virtual office tour and what to expect in your visit. 

Appointment Policies

We operate primarily by appointment and do our best to schedule each appointment with ample time for you to discuss your concerns with your pets. However, as emergencies do take priority, sometimes appointments can be delayed.  Please be courteous to your fellow clients and arrive on time to your appointment. If you need to cancel an appointment, please let our receptionist know 24 hours in advance. We offer drop off appointments for your convenience. The doctor will give you a call when he has assessed your pet. A drop of appointment often requires that the pet remains with us for most of the day. There is no extra charge for a drop off appointment.

Patient Policies

We ask that all canine companions remain on a leash while at our facility and all cats or other small creatures remain in a crate or carrier. This is for their safety and the safety of our clients. For your safety, and the safety of your pet, we ask that you allow our technicians hold your pet while being examined by the doctor. 

Insurance Policies

Pet insurance is a wonderful way to help your pet get the best possible care. Most insurance plans have high deductibles, complicated plans, payout limits and breed restrictions. Trupanion offers one plan, no limits, 90% coverage, and covers all non-preexisting conditions from pets 8 weeks to 14 years. Once enrolled, your pet is covered for life! Click the image to learn more!

Payment Policies

Payment is due at time of service. For your convenience we take Visa, MasterCard, Discover, Care Credit, and Cash. We do not take checks. To sign up for care credit please visit our office or click the button below. We are also Tradebank and Itex members. We will begin taking American Express starting June 1st 2015!


Find us on the map

Office Hours

Our Regular Schedule


8:30 am-1:00 pm

2:00 pm-5:00 pm


8:30 am-1:00 pm

2:00 pm-5:00 pm


8:30 am-1:00 pm

2:00 pm-5:00 pm


8:30 am-1:00 pm

2:00 pm-5:00 pm


8:30 am-1:00 pm

2:00 pm-5:00 pm






Read What Our Clients Say

    I love Callahan Drive Animal Hospital! Best Veterinarian & Staff in Knoxville been going here for 15 years ! Only place I trust with my fur babies ! Everyone is helpful and friendly and they really care about your animals highly recommend !

    Tracy S.

    Took my 3 y/o tortoise recently and I was pleasantly surprised. Not only was the vet knowledgeable and kind, but the overall visit (including an x-ray) was reasonably priced. I definitely recommend and I will be returning for future services

    Valerie B.

    This group loves animals! Everyone is so kind and helpful! This Vet loves sharing information too! Wouldn’t go anywhere else!

    Karen W.

    This is the best vet I’ve ever took my dog to I couldn’t see myself going anywhere else they took very good care of my son and I feel so much better knowing exactly what’s wrong with him very very sweet staff thank you soooooooo much Dr.Hilla and staff

    Diane J.

    Doc Villa ALWAYS takes care of Studly Dudley!! I will ALWAYS recommend Callahan Drive Animal Hospital & their entire team as they truly do care for your animal in the same way you do!! Dr Villa has cared for Dudley for most of his SIXTEEN years & he’s still happy, healthy & strong!! I strongly believe, Stud has made it to this old age so gracefully due to the care he’s been given with this facility!! I would not trust another team than Callahan Animal with my “first child”, the only place for us to go!! Highly recommended!!

    Lauren H.

    10/10 experience was even better than hoped for. As a snake owner, you hear things about vets that make you question taking them and it was very comforting and nice to have someone who not only helped but took the time to talk about caring for them properly. Thank you guys so much!

    Lydia B