Our Staff

Dr. Anthony J. Diaz, P.T., D.P.T., Cert. MDT, FAAOMPT

Dr. Diaz was born and raised in ​Medina, NY, where he graduated from Medina High School in 1993. After receiving Master’s and Doctorate degrees in physical therapy he and his wife opened up Park Avenue Physical Therapy in 2001. Since then Dr. Diaz has completed multiple advanced training courses and continuing education courses with emphasis on manual therapy techniques, orthopedic and sports injuries, and ergonomics. Most recently he has become credentialed in McKenzie Diagnosis and Treatment.

The McKenzie Method is a biopsychosocial system of musculoskeletal care emphasizing patient empowerment and self-treatment. This system of diagnosis and patient management applies to acute, subacute and chronic conditions of the spine and extremities. It offers a reliable and practical approach that focuses on “what patients need” and not on “what therapists want to do“.

To learn more about how the McKenzie approach can be helpful. https://www.mckenzieinstituteusa.org/method-patients.cfm

In 2020, he completed an additional Master’s degree in Orthopedic Manual Therapy (OMPT) and obtained fellowship status in manual orthopedic physical therapy. The American Academy of Orthopaedic Manual Physical Therapists (AAOMPT) is a national organization committed to excellence in Orthopaedic Manual Physical Therapy practice, education and research. Fellows of the AAOMPT strive to provide the highest level of musculoskeletal care through advanced manual therapy practice.

In his spare time, he enjoys spending time with his wife and family, running, weight training, and golfing.

Dr. Nadia A. Nava-Diaz, P.T., D.P.T.

Dr. Nadia Nava-Diaz was born and raised in Buffalo, NY, where she graduated from Nardin Academy in 1994. After receiving her Master’s and Doctorate Degrees in Physical Therapy from D’Youville and Daemen College, she has pursued advanced training in Manual Therapy including myofascial release and soft tissue mobilization, along with multiple courses for spinal conditions, orthopedic and sports injuries. In her spare time, she enjoys spending time with her family, golfing, and playing volleyball.




Amy S. Miller, P.T.A.

A lifelong resident of Medina, NY, Amy decided to make a career change after 19 years of teaching at Kids Country Preschool. In 2011 she graduated from Genesee Community College with a Physical Therapist Assistant Associate’s Degree and began working with our practice in July 2011. She has attended workshops on spinal traction and rotator cuff syndrome and enjoys working one on one with her patients. She resides in Medina and in her spare time, she enjoys teaching piano lessons, biking and canoeing, and spending time with her husband and two daughters.



Dr. Buffie Haley , P.T. , D.P.T , Cert. MDT

Dr. Buffie has resided in Western NY for 10 years after relocating from central NY where she graduated from Clinton High School in 1992. She received her master’s degree from D’Youville College in 1997 and her doctorate degree from Utica college in 2008. She also received her certification in Mechanical Diagnosis and Therapy from the McKenzie Institute, USA in 2001. In her spare time, she enjoys spending time with her family, hiking, camping, and reading.


Jillian Cookinham, PTA

Jillian grew up in Albion and is a 2018 graduate of Genesee Community College earning an Associate’s Degree as a Physical Therapist Assistant. She enjoys working with patients to achieve their goals and the life-long learning opportunities available in the field of physical therapy. In her spare time Jillian enjoys spending time with her family, kayaking, crafting, and taking her dog on long walks.



Jennifer Kuzma-Receptionist

Jennifer has lived in Gasport/Middleport area for 25 years, where her and her husband have 2 children. Jennifer has worked in the medical field for over 20 years. In her spare time, she enjoys being a sports mom and spending time with her family and friends.