William H. Caddoo, DC

Springfield College ’97, Bachelor of Science
New York Chiropractic College ’00, Doctor of Chiropractic
Certified: Active Release Technique (ART), Graston Technique, Kinesiotaping


Chiropractic Physician and owner of Patient First Chiropractic and Physical Therapy in Waltham, Dr Caddoo specialized in the evaluation, treatment and conservative management of Sports Injury. His hands-on approach to care is focused on restoring normal function and keeping athletes active in their sport. His experience and understanding of the athletic patient focuses his care on what is treatable, not just advising them to stop certain activities/sports. Treatments include myofascial release techniques, ART and Graston, joint manipulation, taping techniques and therapeutic exercises to help each patient achieve optimal results.

Dr. Caddoo enjoys keeping athletes from every level performing at their peak potential. His personal philosophy of always striving to be the best version of ourselves fits well within the athletic community.

William’s Hours

Mon: 7:30am to 4pm
Tue: 11am to 7pm
Wed: 7:30am to 2pm
Thu: 1pm to 7pm
Fri: 7:30am to 2pm

Maryellen O’Connor, DC


Dr. Maryellen O’Connor, a native of Waltham, studied Exercise Physiology at Rivier College before graduating with her Doctor of Chiropractic degree from New York Chiropractic College in 2007. As a licensed chiropractor she has extensive training in multiple soft tissue modalities and techniques that include Graston Technique, Active Release Technique (ART) and Fascial Distortion Model (FDM). She is a certified RockTape provider as well.

Maryellen is active in the community participating in high school and employer health fairs. She has interests in pregnancy related pain and postural health and ergonomics.

Maryellen’s Hours

Mon: 10am to 7pm
Tue: 7:40am to 4pm
Wed: 10am to 7pm
Thu: 7:40pm to 4pm
Fri: 8am to 4pm
Sat: 8am to 11am

Lori Caddoo, MSPT
Clinic Director

Lori earned her Bachelor of Science from Springfield College in 1997 and went on to complete her Masters of Physical Therapy in 1998. She started working in upstate New York while Bill completed Chiropractic school. Upon his graduation, they moved back to Massachusetts. She joined Patient First in 2004 after spending 3 years with The Spine Center of New England Baptist Hospital, where she worked with patients to provide rehabilitation for a wide range of spinal conditions and injuries.

In 2015, she took over as the office manager and now handles the day-to-day running of the office. She looks forward to continuing to establish patient relationships and assisting to resolve any questions or concerns you may have.

Outside of the office, she can be found cheering for her boys at their multiple sports, traveling and spending time with her family.

Jessica Bonchi, DPT
Physical Therapist

Jessica attended Boston University, where she earned both her Bachelors of Health Studies in 2015 and her Doctor of Physical Therapy degree in 2017.

Jessica’s experience has been primarily working in the outpatient setting with orthopedic conditions. She also has experience working with vestibular conditions, as well as patients with a variety of medical diagnoses in the inpatient setting. In addition, Jessica has completed training to perform Graston Technique and Dry Needling.

Jessica’s Hours

Mon: 8am to 4pm
Tue: 10am to 7pm
Wed: 8am to 4pm
Thu: 10am to 7pm
Fri: 8am to 2pm

Adrielle Tobias, DPT
Physical Therapist

Born in Washington state, Dr Adrielle Tobias first earned her Bachelor’s of Kinesiology at Western Washington University in 2016. She then moved to the East Coast where she received her Master’s of Anatomy and Clinical Health Sciences and Doctor of Physical Therapy at University of Delaware in 2018. Adrielle has worked in a variety of settings including outpatient with focus in sports, orthopedics, neurologic populations and geriatrics as well as hospital-based acute care and inpatient rehabilitation. She has additionally completed training in the Graston technique and has a special interest in the treatment of balance impairments.

Adrielle’s Hours

Mon: 10:30am to 7pm
Tue: 7:30am to 3pm
Wed: 10:30am to 7pm
Thu: 7:30am to 2:30pm
Fri: 7:30am to 2:30pm
Every Other Saturday: 8am to 11am

Dominique Auger, DPT
Physical Therapist

Dominique earned her Doctorate of Physical Therapy and her Bachelor of Science in Exercise Physiology at the University of Massachusetts Lowell. She completed clinical internships in outpatient orthopedics and acute rehabilitation in the inpatient setting, treating patients with a wide variety of diagnoses. Dominique loves working collaboratively with her patients to design a plan of care to get them back to doing what they love to do. She incorporates patient education into her treatment sessions and emphasizes the importance of a home exercise program so that her patients have the tools they need to become independent in pursuing an active lifestyle and confident in their physical abilities.

During her time at UML, Dominique played rugby and rowed on the crew team. Her passions outside of work include olympic weightlifting, spending time with her friends and family, being in nature, and exploring new places.

Dominique’s Hours

Mon: 11am to 7pm
Tue: 7:30am to 3:30pm
Wed: 7:30am to 2:30pm
Thu: 7:30am to 3pm
Fri: 11am to 7pm
Every Other Saturday: 8am to 11am