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Marta Riniker, DPM, is a fellowship-trained and board certified foot and ankle surgical podiatrist, serving patients at Phoenix Foot and Ankle Institute's Phoenix, AZ location.

Prior to her career in podiatry, Dr. Riniker attended the University of Minnesota in the Twin Cities where she obtained a Bachelor of Science in Nutrition Science, laying the foundation for a comprehensive understanding of human health.  She went on to study at Temple University School of Podiatric Medicine where she was a member of the Pi Delta Honors Society and graduated in 2014. She then completed a rigorous three-year foot and ankle surgical residency in Portland, Oregon, honing her skills in foot and ankle surgery.  Following residency, she furthered her training by pursuing a one-year fellowship in advanced foot and ankle reconstruction, relocating back to Pennsylvania.  She practiced in the Santa Fe area of New Mexico and in Tucson before relocating to Phoenix to join Dr. McAlister at Phoenix Foot and Ankle Institute. Her extensive training prepared her to be able to treat all aspects of foot and ankle conditions, but she takes a particular clinical and surgical interest in sports injuries, foot and ankle fractures, strains and sprains, acute and chronic foot and ankle pain, wound care, and foot and ankle deformity correction.  

Outside of work, Dr. Riniker has many interests and hobbies including hiking, yoga, running, going to the gym, camping, traveling, and exploring new restaurants and coffee shops in town. She is a dog mom to an adorable Pomeranian who joins her on a lot of her adventures.

Dr. Riniker is committed to delivering the highest quality care to her patients.  She places great importance on a team approach, developing a treatment plan together with her patient that is individually tailored to each person’s specific goals and needs. She takes a conservative approach to foot and ankle care whenever possible by employing non-invasive treatments and preventive strategies.  However, when appropriate, surgery may be the best course of action for the desired treatment outcome.  Dr. Riniker is highly skilled and well-trained in surgical procedures and will recommend surgery when it is the best and necessary course of action to provide you with the highest level of care.

Justin Singh, DPM, is a fellowship-trained foot and ankle surgeon. He serves patients at HealthyU Clinics at our Surprise, Avondale, Glendale, and Chandler, Arizona, clinics. 

Dr. Singh grew up in the northwest suburbs of Chicago. After completing his undergraduate degree at Augustana College in Rock Island, Illinois, he completed his podiatric medical education at Rosalind Franklin University of Medicine and Science in North Chicago, Illinois.

Dr. Singh completed a reconstructive surgery and deformity correction fellowship where he advanced his training in revisional foot and ankle surgery, complex limb salvage, peripheral nerve surgery, and total ankle replacement. 

He also furthered his surgical skillset by obtaining extensive training in microsurgery of the lower limb, local orthoplastic flaps, and external fixation. During his fellowship year, he also served as the team physician for their local high school football team.

Dr. Singh completed a reconstructive foot and ankle surgery residency at Mercy St. Vincent Medical Center in Toledo, Ohio, where he gained extensive experience in the reconstruction of the foot and ankle, complex diabetic limb salvage, sports medicine, and trauma. He has presented at national conferences and remains current with surgical and non-surgical treatment options.

Dr. Singh is an associate member of the American College of Foot and Ankle Surgeons. He is also a member of the American Podiatric Medical Association.

He enjoys working out, playing basketball, and learning about new and innovative technology in his spare time.

Antonius Su, DPM, is the founder of Advanced Foot and Ankle Specialists of Arizona in Chandler, Arizona. Board-certified in foot surgery, Dr. Su's mission is to help patients live their lives to the fullest. He takes great measures to ensure his patient's feet remain healthy throughout their journeys.

He completed his undergraduate degree at San Francisco State University in California. After graduating, Dr. Su received his doctoral degree from the California School of Podiatric Medicine in Oakland.

Dr. Su completed two years of surgical residency at the Western Medical Trauma Center in Santa Ana, California, and spent three years looking after the feet of freedom fighters of the United States Air Force in Fairfield, California. Before founding Advanced Foot and Ankle Specialists of Arizona in 1998, he was a part of several other organizations.

When Dr. Su isn’t in the office providing excellent care for your feet, he spends his time with his wife, Jennifer, sons Blake and Scott, and daughter Kellie. He and his family reside in Chandler, Arizona, where he is just a phone call away.

Set your worries and anxieties aside. When it comes to your feet, you can trust Dr. Su and the staff at Advanced Foot & Ankle Specialists of Arizona.

Dzeneta Pajazetovic, DPM

Dr. Dzeneta Pajazetovic is a foot and ankle physician committed to providing compassionate, individualized, and evidence-based care. She completed an intensive Podiatric Medicine and Surgery Residency with added credentials in Reconstructive Rearfoot and Ankle Surgery at NYU Grossman Long Island School of Medicine, where she served as Chief Resident.

During her residency at a Level I trauma program, Dr. Pajazetovic received extensive training in both the surgical and nonsurgical treatment of foot and ankle conditions. Her experience includes reconstructive foot and ankle surgery, fracture repair, minimally invasive surgical techniques, osteotomies, soft-tissue procedures, diabetic limb preservation, advanced wound care, skin grafting, and surgical debridement.

As Chief Resident, Dr. Pajazetovic helped coordinate clinical rotations and academic activities while leading case discussions, journal clubs, and educational workshops. She also conducted research focused on improving mental-health screening and support for patients receiving diabetic wound care, earning an honorable mention at NYU Grossman Long Island School of Medicine’s Research Day.

Dr. Pajazetovic earned her Doctor of Podiatric Medicine degree from the New York College of Podiatric Medicine and a Bachelor of Science in Biological Sciences from the University at Buffalo. She is a member of the American Podiatric Medical Association and the American College of Foot and Ankle Surgeons.

Dr. Pajazetovic is proud to join Arizona Foot and Ankle Medical Center and serve patients throughout the Phoenix Valley. She believes in listening carefully to each patient, clearly explaining treatment options, and developing personalized care plans that help patients reduce pain, restore mobility, and return to the activities they enjoy.

Tawnya Pfitzer, DPM, is an experienced podiatrist specializing in foot and ankle health for the entire family. Whether she’s treating an infant or an adult, Dr. Pfitzer offers a wide range of services at Desert Canyon Foot & Ankle in Avondale, Arizona, where she’s known for her kind and gentle touch.

After receiving her undergraduate degree from the University of Arizona, where she was a member of the honors college and attended on a Presidential Scholarship, Dr. Pfitzer graduated with honors from the California College of Podiatric Medicine in San Francisco. She completed a surgical residency at Northridge Hospital in Van Nuys, California, and has studied both the general practices of medicine and surgery.

Her interests include biomechanics, sports medicine, and pediatrics, and she has extensive training in diagnosis, management, and surgical treatment of both chronic and acute issues.

In addition to her practice, Dr. Pfitzer currently trains podiatry students from Midwestern University in Glendale, California. She lives locally with her husband and two daughters.