Dr. Chris Hummel
I graduated from Purdue University School of Veterinary Medicine in 1994. I spent time practicing in Houston, Texas, and the greater bay area in northern
California before moving to the greater Phoenix area in 2003.
Since coming to the valley, I have worked in multiple veterinary hospitals within the AZPetVet family of hospitals as a relief veterinarian. I started working as a full-time veterinarian at Goodyear Animal Hospital from July 2005 to September 2007 before transferring to Westbrook Animal Hospital as a partner/veterinarian in 2007. I enjoy all aspects of veterinary medicine, from surgery to medicine in dogs, cats and small mammals, such as guinea pigs and ferrets.
My spouse and I live in northwest Phoenix with our 3 wonderful rescue cats, Kazi, Stache and Cricket. When I am not working, I enjoy kickboxing, walking, hiking, cycling, Tai Chi, yoga, caring for my plumeria collection, and reading.
Dr. Martha Ullman
I grew up in the Northwest Indiana/Chicago area. I graduated from Purdue University in 2009. I first moved to Phoenix for an internship after school but returned to the Midwest to work in several states before ultimately returning to the valley.
My interests in practice include preventative medicine, surgery, diagnostic imaging, and dentistry. In my free time, I enjoy hiking, running, baking, and equestrian sports. I live in the Phoenix area with my husband, our dogs: Elli and Freya, our one-eyed cat: Odin, and our Sulcata tortoise: Tyre.
Dr. Brandy Stewart
I grew up in Hawaii, where I met the love of my life. I attended the University of Hawaii at Mānoa for a bachelor’s and a master’s in animal
science. I attended Colorado State University and received my Doctor of Veterinary Medicine in 2019. My love for animals began at a young age with
a childhood pet, a kitten named Angel. Angel had Hydrocephalus (water on the brain) And, Boom! My obsession with veterinary medicine began. My many
childhood trips to the zoo and later volunteering at one ignited my passion for exotic animal medicine. I love working with exotic animals, but my
main passion resides in the feline department.
My husband and I fell in love with Arizona and decided to relocate here! We have a long-haired kitty named Gidget and a small chihuahua mix dog named Lady. In my free time, I enjoy spending time with family, watching movies, reading, visiting zoos, and exploring the outdoors. I am excited to have joined the AZPetVet team and look forward to meeting you and your furry family.
Dr. Caitlin Johnson
I was born and raised in the Valley of the Sun. I attended the University of Arizona, where I completed my undergraduate degree in Veterinary Science in 2015. Then, I moved to the Caribbean island of St. Kitts, earning my Doctorate
of Veterinary Medicine at Ross University in 2019. My senior clinical year was spent at the University of Illinois, where I figured out just how much
I dislike winter, so I decided to move back home to Phoenix. I am interested in all aspects of small animal medicine, soft tissue surgery, and pocket
In my free time, I enjoy traveling, exploring Arizona, and spending time near the water. While at home, I enjoy watching TV with my two cats JD and Luna.