STAFF

Andrew Beyrooty, PT, DPT

Andrew graduated with his Bachelor's degree from Chapman University, Orange, and went on to obtain his Doctorate degree from Rocky Mountain University & Health Professions, Provo Utah. He has been practicing in Utah until he and his wife recently relocated back to his home in California. 

 

In addition to his assets as a physical therapist, Andrew is also fluent in Spanish and looking forward to working 

to work with all patients to help them reach their goals.

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Stellar Zhang, PT, DPT

 

Stellar graduated from the University of California, Irvine with her Bachelors in Biology in May 2016 and her Doctorate in Physical Therapy from the University of Southern California in May 2021, with the first hybrid cohort of USC. Her philosophy in patient care is working with the patient to allow them to return to doing the things they love to do. She is also conversational fluent in Mandarin and is ready to help facilitate communication for this population to assist in the care they receive. 

 

“I’m a tremendous food lover, so if there are any recommendations for delicious foods, I’m always ready to try them. I’m also a huge animal lover. Please don’t hesitate to share pictures of your animal companions should the chance arise!"​​​​

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Matthew Hernandez, PT, DPT, CCS, CSCS

Dr. Hernandez is a highly skilled physical therapist with a Bachelor of Science in Exercise Science from California State University, Los Angeles, and a Doctorate in Physical Therapy from New York University. With 9 years of experience in diverse clinical settings, Dr. Hernandez has worked with an eclectic patient population, providing tailored care to meet each individual's needs. As an APTA board-certified cardiovascular and pulmonary specialist, he is committed to delivering the highest quality of care. Beyond their professional life, Dr. Hernandez enjoys writing and producing music, playing basketball, and running, which reflects his passion for maintaining an active and balanced lifestyle.

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Joseph Duran, PT, DPT

Joseph received his Bachelor’s degree in Allied Health from Azusa Pacific University and graduated with his Doctorate in Physical Therapy from the University of Southern California. Before graduating in May of 2024, Joseph completed his final clinical rotation at CORE Orange where he treated a variety of patients, accumulating finesse in clinic manual skills and exercise prescription.

Joseph grew up playing baseball, football, and running track in high school. His exposure to physical therapy followed a baseball injury, where he was inspired to combine his love of athletics with serving others. He is committed to providing the highest level of care for his patients, which allows his enthusiasm for life to shine through his work in the clinic.

When not at work, Joseph enjoys spending time with his family, watching movies, working out, and playing outside with his daughter. Joseph is excited to be a member of the CORE family and is ready to assist his patients on their road to recovery.​​​​

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Sarah Andreshak, PT, DPT 

Sarah grew up in Orange County and graduated with a Bachelor of Science degree in Exercise Science from Northern Arizona University in Flagstaff, Arizona.  She obtained her Doctorate degree from Chapman University.

She grew up playing soccer, which eventually resulted in her needing physical therapy.  Her experience in physical therapy showed her the impact that a PT can have on one's life. Sarah is committed to providing the highest quality of care with special emphasis on treating the whole person.

While not at work, she enjoys hiking, reading, and watching soccer. 

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Lauren Yapo, PTA

​Lauren is an Orange County native, where she grew up playing soccer and running track. She decided to pursue a career in physical therapy after taking human anatomy in high school and seeing that she could apply her interest in science with her joy for sports. She attended San Francisco State University and received a Bachelor of Science in Kinesiology with a concentration in Exercise and Movement Sciences. After missing the warm southern California sun, she moved back home and attended Cerritos College, where she graduated from their Physical Therapist Assistant program. In her spare time, Lauren enjoys doing Pilates, playing with her dog, and trying new restaurants.

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Jon Arroyave, PTA 

Jonathan, who also goes by Jon, was born and raised in Anaheim, CA, until his early teenage years when he and his family moved to Fullerton, CA. Jon graduated with a B.S. in Kinesiology from Cal State Fullerton. Early on, Jon knew he wanted to stay involved in the health industry, so he began as a personal trainer. Not receiving the fulfillment he sought, he then found employment as a PT Aide with C.O.R.E. Physical Therapy, where he worked for 10+ years. While navigating life during this time and pursuing other endeavors, Jon was unfortunately diagnosed with Stage IV cancer. Through this adversity, Jon found the courage to enroll at American Career College - Orange County and pursue his license as a PTA. He has returned to the C.O.R.E. team. During his free time, Jon enjoys being physically active, such as resistance training, playing rugby, and hiking with his dog, Cher. As always, you can also find him rooting for the Lakers, Vikings, and Dodgers.​

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Bethany Sahagun, PTA

Bethany Sahagun is a PTA graduate from California Baptist University who grew up in Norco, CA. Bethany found her passion for movement and wellness of the human body as a dance teacher, where she met others who had begun to work in healthcare. Bethany attended CBU for her bachelor's degree in kinesiology for sport performance, where she narrowed down her interest in physical therapy and was accepted to their physical therapy assistant program. Bethany is especially interested in hypermobile populations and giving them the strength and joint stability to interact with life to the fullest! Bethany enjoys spending her free time line dancing with friends, reading, and working out. ​

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Daphne Gonzalez, PTA

I grew up in Los Angeles County but always felt drawn to Orange County and knew I wanted to build my career here. I spent many years in Fullerton for both school and work, which helped shape my passion for serving this community. I attended American Career College with the goal of becoming a Physical Therapist Assistant after working as a caregiver and CNA for over three years.

 

I have always had a strong passion for helping others, and I find it incredibly rewarding to see patients’ excitement and progress as they work toward their goals. My main reason for transitioning from a CNA to a PTA was to help patients regain independence and return to their everyday activities, no matter their age or background.

 

Outside of work, I enjoy staying active through certain workouts and hiking. I also love watching movies, treating myself to sweet desserts, and spending quality time with family and friends. In my free time, I like to challenge myself by learning new skills—right now, I’m working on sign language and calisthenics​

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Paulina Arredondo, PTA

I initially worked as an aide and enjoyed working with patients before joining the PTA program. I graduated from the PTA program at Loma Linda University. I grew up in San Bernardino County. During my free time, I enjoy hiking and staying active. I recently hiked Cucamonga Peak 12 miles. I value spending quality time with family, friends, and pets. I enjoy listening to music and going to concerts.

 

Julisa Lopez, CMT

Certified Massage Therapist

Julisa was born and raised in Fullerton, CA, and attended Fullerton Union High School and graduated from Fremont University in Cerritos with her Certified Massage Therapist certification.  Julisa got into massage therapy because she always felt the need and joy to help people feel relief from pain. She also enjoys going to the beach to watch the sunset and being around family, as well as cooking delicious meals and always trying new recipes. Julisa sets goals daily to improve herself as a person and as a massage therapist. Lastly, if you can not find her at the Anaheim or Orange location, she will most likely be at Disneyland with all her Stitch gear.