Our Team

Michael A Marciello, MD

Michael A Marciello, MD

Physiatrist located in Leominster, MA

Michael A. Marciello, M.D. is a practicing Physiatrist since 1998. He is a licensed physician who obtained his board certification in Physical Medicine and Rehabilitation after completing a medical internship at UMass Medical Center and then going on to complete his residency training at Spaulding…

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Alexander Gimmelberg, PA-C

Alexander Gimmelberg, PA-C

Physician Assistant located in Leominster, MA

Alex joined the GCMW practice in 2017 as a Physician Assistant. Originally from the Ukraine, Alex moved to Boston in 1989 with his wife, child, and parents. He graduated from the Physician Assistant program at Graduate School at Bouve College at Northeastern University in Boston,…

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Timothy W. Gallagher, DC, Founder and CEO

Timothy W. Gallagher, DC, Founder and CEO

Chiropractors located in Leominster, MA

Timothy Gallagher, D.C., Founder and CEO of Gallagher Chiropractic and Medical Wellness, is a licensed chiropractor and has been serving patients in Central Massachusetts since 1997. Dr. Gallagher earned his undergraduate degree from the University of Massachusetts. He went on to receive his Doctor of…

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Colleen Gallagher, DPT

Colleen Gallagher, DPT

Colleen Gallagher, DPT has been a practicing Physical Therapist since 2000. Colleen grew up in California but started her education at the University of Arizona where she graduated with a Bachelors in Health Sciences. She then returned to California and entered Chapman University’s Masters in…

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Success Stories


Dr. Danny greets her patients with lots of energy and a big smile. Her exams are very thorough and is open to feedback and other input from her patient. Dr. Danny will do everything she can to make sure that her patients receive the best care and will work until she finds a solution.

Sandra R.