All our professionals at Commonwealth Mobile Oral Health Services (CMOHS) maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in dentistry.

Mark E. Doherty DMD, CAGS, CEO and Chief Dental Officer 


Dr. Mark E. Doherty is the CEO of Commonwealth Mobile Oral Health Services (CMOHS), co-founder and CEO of D4 Practice Solutions, and partner at Southcoast Endodontics.  CMOHS is a portable dental practice founded in 1979 by Dr. Doherty’s father, Dr. Mark J. Doherty. CMOHS provides comprehensive dentistry in over 300 locations throughout the state of Massachusetts to populations who face barriers to accessing dental care. As a dynamic dental specialist overseeing a multi-site private practice and extensive experience in the provision of restorative and routine dental care to underserved populations, Dr. Doherty offers a multi-faceted level of expertise to our many clients.

Dr. Doherty has served as Dental Director for a Federally Qualified Health Center and a Public Health Dental Center, as well as an associate clinical instructor for the Post Graduate Endodontic Residents at the Boston University Henry M. Goldman School of Dental Medicine. Dr. Doherty is past Chair for the Southeastern District Dental Society, a former Co-Chair for the Yankee Dental Congress, and served on the program core committee for the Yankee Dental Congress. Dr. Doherty also serves as an expert witness on dental-related matters.

Dr. Doherty is a 6th generation dentist and a 2003 graduate of the University of Pennsylvania School of Dental Medicine. He completed his post-doctoral training at the Boston University Henry M. Goldman School of Dental Medicine in Endodontics (Root Canal Therapy) and received his specialty degree in Endodontics in 2005.

Andrea Dickhaut, RDH, BSDH, MHA, Senior Advisor


Andrea Dickhaut is a seasoned dental professional with over thirty years of clinical and management experience. At CMOHS, Andrea consults in her areas of expertise with leadership on the overall organization of the company. Andrea previously served as a private practice dental hygienist for many years, and more recently, she has held administrative leadership roles in a variety of organizations, including private practices, FQHCs, hospital dental programs, and portable dental programs.

Andrea was previously the Operations Manager at DentaQuest Oral Health Center and served as an Expert Advisor for Safety Net Solutions with a focus on practice improvement and revenue cycle management. She currently holds the position of Senior Advisor for D4 Practice Solutions. Andrea holds a BS in Dental Hygiene from Northern Arizona University, a master’s degree in health care administration from Worcester State University, and a Certificate in Health Center Management from Suffolk University.

Tammy Cataldo, Program Manager

Tammy Cataldo is the program manager for Commonwealth Mobile Oral Health Services and has been with the business since 2010. In addition, Tammy acted as the office manager for the Taunton Oral Health Center which was a non-profit community dental clinic from 2013-2019 and billing specialist for Southcoast Endodontics from 2020-2022. In her free time, Tammy loves spending time with her family, fishing and traveling.

Jennifer Redding, Human Resources Advisor, Community Outreach Coordinator

Jennifer Redding is the Commonwealth Mobile Oral Health Services human resources advisor and community outreach coordinator. She joined CMOHS in 2006 as the Executive Assistant for Dr. Mark J Doherty.  Jennifer is also the program coordinator for D4 Practice Solutions, which is a dental practice management consulting business. She previously worked at Morton Hospital and Medical Center in the Human Resources Department as a representative.  Jennifer graduated from Stonehill College with a Bachelor of Arts degree in 1991.  In her free time, Jenn loves spending time with her husband and children, reading, and cheering on the Patriots and the Red Sox.

Sheli Young, Billing Specialist

Sheli Young is the Billing Specialist for CMOHS. She joined CMOHS in 2017. Sheli brings many years of clinical and insurance experience to our team. She started her career as a certified dental assistant and progressed to insurance administration. She is a graduate of Southeastern Regional Vocational Technical School with a certificate in dental assisting. In her free time she enjoys spending time with her family, hiking, enjoying live music, reading and traveling.

Nancy Johnson-McDonough, Lead Dental Assistant

Nancy Johnson-McDonough is the Lead Dental Assistant for Commonwealth Mobile Oral Health Services. Nancy started with CMOHS in the 2009-2010 school year. She currently is the lead dental assistant for the Taunton Oral Health Center, where she has been employed since 2008.

She attended the dental assisting program at Health Care Training Services in 2007 at the age of 50 where she graduated with a certificate in dental assisting. In 2013 she took the DANB to become a certified dental assistant. Spending time with family, eating out, attending concerts and vacationing in Florida are among her favorite things.

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