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David J. Roberts, MSPT/PTCO


Currently accepting new patients in Marblehead 

David Roberts founded North Shore Physical Therapy Associates, Inc. in 1981 and has dedicated his time and effort to developing a quality physical therapy practice to serve the communities north of Boston. His expertise is in orthopedic physical therapy.

David's experience includes working at the 1984 Olympics as a physical therapist. He has co-authored research articles on chronic pain and has instructed Clinical Kinesiology at Northeastern University. Boston University has found him lecturing on pain management. Additionally, David has lectured on Shoulder Dysfunction at the International Music and Medicine Conferences in California. David was also a consultant at Massachusetts General Hospital's Musician's Clinic from 1990 to 1995.

After receiving a Bachelor of Science degree in physiology from Michigan State University, David earned a Master's Degree in Family Counseling. In 1978, he received a second Master's degree, in Physical Therapy at Boston University. After his first semester at Boston University, David was awarded an academic scholarship based on his caliber of performance at school. He is a member of the American Physical Therapy Association and is active in the Private Practice, Orthopedics and Sports sections of that organization.

 Nancy DeMuth, DPT, M. Manip. Ther

Staff Phsical Therapist

Currently  accepting new patients in Marblehead

Nancy joined North Shore Physical Therapy in 1998.  Dr. DeMuth earned her doctoral degree in Physical Therapy in 2007 from the MGH Institute of Health Professions in Boston, MA.  She received her Masters degree in Manual Therapy in Australia in 1997 and her Masters in Physical Therapy from Boston University in 1987. 

Her expertise is in the treatment of spine, geriatrics, and the prevention and treatment of injuries associated with dance and pregnancy.

Outside her practice at NSPT, Nancy pursues dance, yoga and movement which she has studied for over 40 years.  She teaches adult classes in Kripalu yoga/dance and has adapted theses classes for older adults and those with various physical limitations, including those with Parkinson’s disease.

 Olivia Lufkin, PT, DPT, Vestibular PT

Currently accepting new patients in Marblehead 

Olivia was born and raised on the North Shore. She went on from Gloucester High School to the University of New England where she graduated with her B.S. in Applied Exercise Science. Olivia completed her senior year internship working at an outpatient physical therapy clinic in Maine, where she solidified her interest in the field with hands on clinical experience. She chose physical therapy due to her interest in helping others live a healthy lifestyle and improve their quality of life. She went to graduate school in Boston at the MGH Institute of Health Professions, graduating with her doctorate degree in physical therapy.

 Olivia has had clinical affiliations in inpatient rehabilitation, outpatient orthopedics and the public school system before completing her final internship here at North Shore Physical Therapy. Olivia enjoys working in the outpatient setting best as it gives her time to form relationships with her patients and help them progress over time. She enjoys working with patients across the age spectrum, ranging from children and young athletes, to the geriatric population.  Specializes in joint and muscle functioning and vestibular rehab.

Outside of work, Olivia enjoys staying active and playing her favorite sports- tennis, basketball, and softball. She is a huge Boston sports fan. She loves spending time with her friends, her family who live locally, and their two golden retrievers.

Jasminn Bean, PT, DPT, Vestibular PT

Currently accepting new patients in Marblehead

Jasminn grew up in Syracuse, New York and spent a lot of her time playing soccer and lacrosse.  Multiple injuries and surgeries in high school introduced her to different healthcare providers associated with orthopedic/sports medicine, including a few physical therapists.  She appreciated the time her physical therapists took to get to know her and tailor an individualized treatment program to get her back to her sports each time.  From then on, Jasminn knew she was interested in pursuing physical therapy as a future career.

Jasminn completed her Bachelor’s degree in Biology at SUNY Geneseo and her Doctorate of Physical Therapy at SUNY Upstate Medical University in Syracuse, New York.  Throughout her clinical rotations in physical therapy school, she developed an interest in treating both orthopedic and neurological populations in the outpatient setting.  Jasminn’s special interests include lower back pain, balance impairments/deconditioning, and neurological diseases such as Parkinson ’s disease.  Specializes in vestibular rehab and joint and muscle functioning.

Outside of work, Jasminn enjoys staying active with running, Pilates, taking spin classes, and hiking.  She also enjoys following Syracuse University sports, as well as spending time with friends and family.

Hargun Khanna, PT, DPT

Currently accepting new patients in Marlbehead 

Hargun Khanna grew up in Lexington, MA then graduated from UMass Amherst with her Bachelor of Science degree in Biology. Her passion for learning drove her to pursue her Doctor of Physical Therapy from MGH IHP. Hargun enjoys working with a variety of diagnoses and age groups. Her favorite part about physical therapy is getting to be a part of the recovery process while getting to know her patients beyond their diagnoses.


Hargun has a variety of clinical experiences - including in patient, emergency medicine, pediatric and hospital based outpatient orthopedic settings. Additionally, Hargun was awarded the Mary Mankin Prize at MGH IHP. She was awarded based off her significant potential as a clinical scholar and her use of evidence to support optimal clinical care.


Outside of the clinic she loves swimming at the beach with her dog, singing her heart out at karaoke, and creating pottery.

 Jonathan Weltler, PT, DPT/PTCO Peabody

Staff therapist/Aquatic PT at the Torigian Family YMCA in Peabody

Currently accepting new patients in Peabody, MA

Jonathan joined North Shore Physical Therapy in June 2014. He is from Hamilton, MA and returned to the area after completing both his undergraduate and graduate degrees in Pennsylvania. He received his Bachelors of Science degree in Exercise and Sports Science from Ursinus College in Collegeville, PA. While at Ursinus he was a dance minor, four year member of the wrestling team and three year member of the rugby club. After graduation he attended Temple University in Philadelphia where he obtained his Doctorate in Physical Therapy. During his time at Temple, Jonathan had multiple outpatient orthopedic affiliations in Northeast Massachusetts as well as Philadelphia.

Jonathan has a special interest in shoulder and low back injuries as well as post surgical clients and sports injuries.  Specializes in joint and muscle functioning.

Outside of work, Jonathan enjoys working out, bowling, going to the movies and spending time with friends and family.

Thomas J Baldwin, PT, DPT

Currently accepting new patients in Marlehead, MA and Peabody, MA

Tom was born and raised on the North Shore of Boston.  He graduated from Salem State University with a baccalaureate in Biology with minors in Chemistry and Psychology. 

 After a few years working in biotechnology, Tom attended the Massachusetts General Hospital Institute of Health Professions and earned a Master of Science Degree in Physical Therapy. Shortly thereafter he earned his Doctorate in Physical Therapy at MGH-IHP. 

A passion for learning and providing the highest level of care to his patients motivated Dr. Baldwin to become APTA Board Certified in both orthopedics and geriatrics, and later to become a certified manual therapist through Maitland Australian Physiotherapy Seminars.

He brings his 23 years of physical therapy experience to North Shore Physical Therapy. 

Tom’s other interests include Yang style Tai Chi Chuan, Hatha Yoga and Pickleball.