General and advanced orthopedic injury, sports injury, spinal disorders, hand therapy, work and personal injury, rheumatic disease, podiatric disorders, neurological disorders, oncology related illness

Locust Valley Location
  • Address:146 Birch Hill Road
    Locust Valley, NY 11560
  • Phone: 1-516-759-9717
  • Email: cs@soundsidept.com
Jericho Location:
  • Address:200 Robbins Ln, Suite D2
    Jericho, NY 11753
  • Phone: 1-516-723-4020
  • Email: cs@soundsidept.com
Contact Jericho: 1-516-723-4020

Meet Your Therapist


physical therapist

James Kalenderian, PT
President, SoundSide Physical Therapy

Graduated from the University at Buffalo in 1999
Bachelors of Science Degrees in Physical Therapy and Sport & Exercise Physiology

When I became a physical therapist my goal was to provide outstanding one-on-one care. Not satisfied with the quality of care that was available, I decided to venture out on my own. I began small, visiting homes of my patients to provide the excellent one-on-one service that I believe in. The overwhelming response I received from my home care services led me to open my first clinic in September 2001.

It has been a pleasure being part of the local community which has enabled us to relocate my practice nine years later to a much larger state-of-the-art medical complex located in the heart of Locust Valley. The goal of my outpatient orthopedic facility is to continue the intense one-on-one attention while offering the best environment for rehabilitation. I have invested in new state-of-the-art equipment, including the Biodex un-weighting system and a line of Quantum & Sci-Fit exercise equipment. As well as, the Phoenix Thera-Lase system, which is a class four, cold laser that is used by professional NFL & NBA teams and athletes for rehabilitation.

We are now happy to bring our superior hands-on skills to my hometown of the Syosset/Jericho community. We are committed to excellence in our new 8,000 sq. ft. faculty that is tailored to maximize results.

As always, my primary goal when treating patients is to provide quality one-on-one physical therapy allowing our patients to progress with rehab in the most timely and efficient manner possible.  SoundSide stands for quality care with a personal touch.

Dr. Adam Johnnidis, DPT, CAFS
Director of SoundSide Physical Therapy Jericho

Graduated from SUNY Oswego in 2008
Undergraduate Degree in Biology

Graduated from the Long Island University, Brooklyn in 2012
Doctorate of Physical Therapy

After becoming a licensed physical therapist, Adam chose to start his career as a traveling P.T. This helped him gain immense professional and life experience while working from Wyoming to Washington DC and in between. After 2 years of traveling, he settled in Hawaii for 2.5 years, working primarily with orthopedic and sports patients. After his time in Hawaii, Adam returned to his home on Long Island so he could be closer to his family and provide excellent care to the community in which he grew up in. 

He has since became a provider of the unique Graston technique, which is an instrument assisted soft tissue mobilization. This technique helps the treatment of scar tissue and fascial restrictions during rehabilitation, allowing for faster rehab and proven success in restoring range of motion, eliminating pain, and restoring normal function.

Adam has been with SSPT since 2017. He is currently the Director of SoundSide Physical Therapy's newest facility in Jericho. There he provides quality, personalized P.T. in combination with the Graston Technique and our new sports-specific turf training area. 



Katelyn Morrie, ATC

Graduated from Stony Brook University in 2017
Bachelors of Science Degree in Athletic Training

Katelyn is a Long Island native and proud graduate of Schreiber High School in Port Washington. She graduated as a member of Iota Tau Alpha - Athletic Training Honor Society, and Alpha Eta Honor Society for Allied Health Professions. Katelyn plans to return to school in order to pursue her doctorate in Physical Therapy.

In her free time, Katelyn is a staff member at HorseAbility located in Old Westbury. She teaches therapeutic horseback riding lessons to the special needs community and earned her PATH Certification for therapeutic horseback riding instruction in 2016. Katelyn’s end goal is to blend her two passions, horses and health care, by incorporating Hippotherapy into her physical therapy practice. Hippotherapy is using the horse as a treatment tool in order to facilitate functional gains in patients. 


Kayla Rosario, ATC

Graduated from Dominican College in 2017
Bachelors of Science Degree in Athletic Training

Before coming to SSPT, Kayla worked as a high school athletic trainer and now is enjoying focusing on the rehab aspect of her athletes. Kayla spends most of her free time on the volleyball court, whether playing for fun or as a coach for Sportime in Bethpage.



At SoundSide Physical Therapy, we believe that providing outstanding one-on-one care while offering the best environment for rehabilitation is essential for your independence.  We strive to progress our patients with rehabilitation in the most timely and efficient manner possible.

Locust Valley:

(516) 759-9717


(516) 723-4020


  • Address: 146 Birch Hill Road
    Locust Valley, NY 11560
  • Phone: 1-516-759-9717
  • Fax: 1-516-759-1666
  • Email: cs@soundsidept.com

  • Address: 200 Robbins Ln, Suite D2
    Jericho, NY 11753
  • Phone: 1-516-723-4020
  • Email: cs@soundsidept.com