Welcome to Beachside Animal Clinic!

Your Veterinarian in Sanibel, FL
Call us at 239-579-0804

Welcome news to island pet owners! Full service veterinary care is now available directly on Sanibel.


Beachside Animal Clinic is a full service animal clinic offering medicine, surgery, dental care, radiology, laboratory, flea and tick control, and weight control directly in our new, ground floor, Sanibel facility. Surgery, x-ray, and emergency services are now available without driving to the mainland. In addition, these services are provided at a cost that is similar, or in many cases, less than those found on the mainland. We do not charge additional filing fees for new patients. Please call our friendly staff for an appointment.

Mark Mathusa, a Sanibel resident and University of Florida graduate, is a licensed veterinarian treating all types of pets including dogs, cats, reptiles, and exotics. Your pet's health and well being is very important to us, and we will take every step to give your pet the best possible care.

Beachside Animal Clinic will take early evening emergencies as well as less urgent medical, surgical, and dental issues. Dr. Mathusa is experienced in all types of conditions and treatments. Beyond first rate pet care, we make our clinic comfortable, kid-friendly, and a very calm environment.

We have a number of resources for you to learn how to take better care of your pets. Browse the website and look at our articles and pet videos. The best veterinary care for animals is ongoing nutrition and problem prevention. If you have a question, please call us at 239-579-0804. Our Sanibel office is very easy to get to at 1640-3 Periwinkle Way, in the Lime Tree Center, across from Bank of the Islands. You can find directions on our 'Contact Us' page. In between your veterinary visits, your pet will benefit from you reading these free informative articles.

So save the trip to the mainland. Come visit our clean and friendly facility. Spend less time running around, and a little more time on our beautiful island.

At Beachside Animal Clinic, we treat your pets like the valued family members they are.

Mark Mathusa
Sanibel Veterinarian | Beachside Animal Clinic | 239-579-0804

1640-3 Periwinkle Way
Sanibel, FL 33957

Vet Source Online Pharmacy


Need a medication, flea control, or pet food that is not kept in our hospital? No problem! Beachside Animal Clinic now offers Vet Source online pharmacy.  Advantages of Vet Source include

With the exception of Science and Purina pet foods, all orders over $49.99 are provided standard shipping for free. Click on the purple link above to access the Vet Source store, place your order, and medications are shipped to your door. If you prefer, call or come by the clinic and we will take your order here. With Vet Source, the Beachside Animal Clinic assures that you will get the product you want, with the safety and quality assurance you need.

  1. Competitive fees.
  2. Online prescription requests come directly to our hospital so prescriptions are approved without delay. You may also contact us by phone, or stop by the clinic to place your order.
  3. Your medications come directly from the manufacturer to Vet Source. There is no third party transaction as with many other online pharmacies. These third party transactions void manufacturers guarantee of efficacy.

Office Hours

Our Regular Schedule


8:00 am

4:00 pm


8:00 am

4:00 pm


8:00 am -12:00 pm

Doctor is Not Available: Only Prescription Food and Scripts


8:00 am

4:00 pm


8:00 am

4:00 pm






Find us on the map

Featured Articles

Read about interesting topics