Meet the D&D Team

D&D is extremely fortunate to have a talented group of clinicians and support personnel


Kathy I. Dieringer EdD, LAT, ATC


Kathy is a licensed and certified athletic trainer, who has been in the profession for over thirty five years, and is the original owner/founder of D&D Sports Med. She has extensive experience in the treatment and rehabilitation of high school, collegiate, and professional athletes. Kathy is active in her profession, serving in various leadership positions and earning multiple awards throughout her career. 


Clinic Managers

Kathy Heimerdinger PT, COMT


Kathy graduated from Texas Woman’s University with a masters degree in physical therapy in 2000. She has worked in outpatient orthopedics in the DFW area since graduating. Kathy is currently...

Adele Olbricht-Foster PT


Adele graduated with a Bachelor of Science in Biology from Texas A&M University. She then went on to get her Bachelor of Science in Physical Therapy in 1981 from UT Health Science Center in Dallas. Adele has enjoyed various experiences in.....

Alex Cruz PT, DPT


Alejandro, who commonly goes by Alex, was born and raised in Northern Virginia and graduated from
Franklin Pierce University in 2017 with his Doctor of Physical Therapy Degree in Manchester, NH. He is also a
Certified Strength and Conditioning...

Bree Windham

Office Coordinator

Bree has been navigating insurance for over 10 years. She joined D&D in 2012 as a receptionist and progressed to the office coordinator position in 2014. She attended Sanford Brown University for her medical coding and billing degree..


Andra Sterzik OTR, CHT

Denton Hand Therapy

Andra is a certified hand therapist who graduated with her Master’s in Occupational Therapy from Texas Woman’s University in 1997. Since that time, her work throughout the DFW area has included both inpatient and outpatient care, as well as neurological rehabilitation. During her time at D & D Sports Med, she has focused her skills on the treatment of hand and upper extremity post- operative.... 

Rachel Perkins PT, DPT


Rachel attended Centenary College of Louisiana, where she played volleyball and earned her bachelor's degree with a double major in Biology and Psychology in 2016. She then attended UT Southwestern School of Health Professions, where she graduated with her doctorate of physical therapy in 2018. Rachel is certified in Dry Needling, is currently working towards her strength and conditioning certification (CSCS), and hopes to eventually achieve board certification through the APTA as an orthopedic clinical specialist (OCS). Rachel is passionate about working with athletes and facilitating return to sport, as well as using exercise to help people of all ages return to their hobbies, and prior level of function. Outside of the clinic she enjoys running with her dog Jaxson, playing volleyball, and trying new restaurants with her friends.

Ellen Perez PTA


Ellen graduated from Texas State University with a Bachelor of Science degree in Exercise and Sports Science/Health and Wellness Promotion from Texas State University. She was a certified trainer through the American College of Sports Medicine and naturally continued her studies in Florida at Herzing University to become a licensed Physical Therapist Assistant. Driven by a more holistic approach, she values the vital...

Chase Duell PT, DPT


Chase graduated from The University of North Texas with a Bachelor’s degree in Kinesiology in 2016. He then attended UT Southwestern for his Doctorate of Physical Therapy, graduating in 2018. He is currently working towards becoming a Certified Strength and Conditioning Specialist as well as earning his IAOM-US dry needling certification. Chase is also an active member of the Sports Section of the American Physical Therapy Association. His special interests...


Lesley Hedlund OT, MOT


Lesley graduated from Texas Tech University Health Science Center with a BSOT in 1999.  She has experience working in Acute Care, Inpatient & Outpatient Rehab, with 10+ years working with Hand and Upper Extremity patients.  She has completed a Hand and UE Fellowship thru St. Luke’s Hospital in Bethlehem, PA and is certified in Ergonomic Assessment (CEAS I).

Conner Davis PT, DPT


Conner graduated from The University of North Texas with a Bachelor’s degree in Applied Behavior Analysis. He then attended The University of Mary Hardin Baylor where he received his Doctorate of Physical Therapy degree. Following graduation, Conner earned his IAOM-US dry needling certification. He is also an active member of the American Physical Therapy Association and is currently working towards becoming an Orthopedic Clinical Specialist. Conner believes in building a strong therapeutic alliance with his patients while guiding them through their rehabilitation journey.

Marie Fischer OT, CHT


Marie has been an Occupational Therapist since 1980.  Although she has worked treating people from in-patient settings to out-patient settings and from infants to elderly, she has always preferred treating people with hand/arm issues.

In 1991, Marie was one of the first group of therapists nationally to become a Certified Hand Therapist.  Marie is a member of both the...

Office Staff


Candice Wright


Billing Coordinator



Martha Barboza