Welcome to Hands On OT
Paul Gerstenfeld, MS, OTR/L CHT 

Paul is a Certified Hand Therapist who earned a Master’s Degree is in Occupational Therapy with his undergraduate degree in Recreational Therapy, minoring in Psychology. He has been specializing in rehabilitation of the upper extremity for over 17 years now. He has taught English as a Second Language, Physical Education, Massage Therapy, worked in special education and with troubled youth. His clinical skills in concert with a rich multidisciplinary background helps him treat the person rather than the injury alone. 
Now as owner and operator of Hands On OT he has the freedom to personalize his treatments and partner with patient’s towards reaching their recovery goals.

Jamie Rosenblum, MS, OTR/L, PAMs

Jamie joins us from New York City where she earned her Master’s of Science in Occupational Therapy (MSOT) from New York University. She completed affiliations in Acute Inpatient Rehabilitation at New York Presbyterian-Columbia and in Outpatient Orthopedics at NYU Langone’s Center for Musculoskeletal Care. She continued specializing in rehabilitation of the hand and upper extremity at NYU Langone’s Center for Musculoskeletal Care following graduation and delivered a poster presentation at the 2016 AOTA conference entitled “Technology in Hand Therapy: Current Concepts in the use of Applications for Clinicians and Clients.” She continues to work towards becoming a Certified Hand Therapist, a goal of hers since 2006 when she sustained an injury that brought hand therapy into her life. Jamie is passionate about evidence-based practice and tailoring each session to the individual needs of her patients to maximize outcomes.

Jade Yim, OTR/L
Jade graduated from Boston University with education in psychology, health sciences, professional service management, and evidence-based research. With knowledge and experience in leadership, innovation, team participation, and program development, I strive to become a well-rounded, highly motivated, and diligent professional in the health care field.  

Dr. Jordan Istrin, DPT

Dr. Jordan Istrin is a Los Angeles native who received his Doctorate of Physical Therapy from California State University Northridge. In his work, Jordan explores multiple aspects of the Physical Therapy field to ensure the best possible Outcome for his patients. His approach to therapy involves hands-on manual techniques, as well as therapeutic exercise and functional movements. To better serve his patients, Jordan was inspired to study various myofascial release methods, including the Graston Technique and dynamic cupping, which he now incorporates into his treatment programs. He utilizes a whole-body approach to managing symptoms and improving the patients' functional ability to perform everyday activities. Being an avid cyclist and hiker, Jordan understands the importance of strength, mobility and flexibility and the essential role that each of these play in the healing process.

Natalie Guzman- OT/PT Aide

Natalie has been part of the Hands On OT team since 2013. She is a Physical Therapist Technician with has 16 years of work experience primarily in Physical Therapy and Hand Therapy settings. Working closely with the Therapists, she assist with patient's treatment as well as assisting front office when needed.

Dalia Ponce- Office Manager

Dalia has 19 years of work experience primarily in Hand Therapy and Physical Therapy settings. She is customarily the liaison with patient between physician, insurance companies, workers compensation and scheduling appointments. As Physical Therapist Technician, she is available to assist with patients treatment when needed. She is a hard working office manager who partners with patients to keep all administrative issues behind the scenes running smoothly.


Hands On OT accepts most major insurances (PPO). We are in-network providers for Anthem Blue Cross, Blue Shield,
Access Medical Group (HMO), Saint John's Health (HMO), Oscar, Medicare, Tri-Care and Workers Compensation insurances. For patients with Access Medical Group (HMO), Saint John's Health (HMO), or Workers Compensation cases, written prior authorization is needed. If we are not an in-network provider for your insurance plan, please allow us to check your out-of-network benefits. For further information or questions, please contact Dalia directly at

We accept Medical Liens on a case by case basis. Non insured patients are welcomed.

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