Mark Benjamin Davidson, MD

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

• Marlborough Hospital Hospital · Marlborough, MA · listed as Marlborough Hospital Corp
• Umass Memorial Health - Harrington Hospital Hospital · Southbridge, MA · listed as Umass Memorial Health-Harrington Hospital Inc
• Umass Memorial Medical Center/University Campus Hospital · Worcester, MA · listed as Umass Memorial Medical Center
• Preferred Transitions Home Health Care Inc Home health agency · Milford, MA
• Vna Care Network Home health agency · Worcester, MA · listed as Vna Care Network, Inc

Colleagues at Umass Memorial Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2467 clinicians in the practice; 12 are shown here.

• Jennifer L. Belleville, PA-C Physician Assistant · North Attleboro, MA
• Dr. Michael A Burdulis, MD Family Medicine Physician · Shrewsbury, MA
• Mary Dawn T Co, MD Infectious Disease Physician · Worcester, MA
• James A Evans, MD Geriatric Psychiatry Physician · Quincy, MA
• Dr. Syed H Kamil, MD Otolaryngology Physician · Worcester, MA
• Stephen Martin, MD Family Medicine Physician · Barre, MA
• David Dionne McManus, MD Clinical Cardiac Electrophysiology Physician · Worcester, MA
• Jane A. Molinari, MD Gynecology Physician · Shrewsbury, MA
• Doreen M Norberg, NP Emergency Medicine Physician · Southbridge, MA
• Mrs. Cindy Munro Popovic, APRN Obstetrics & Gynecology Nurse Practitioner · Milford, MA
• Bruce B Rosen, MD Internal Medicine Physician · Uxbridge, MA
• Allan J Walkey, MD Internal Medicine Physician · Worcester, MA

Other providers in Webster

• Lindsey Jae Giroux

  Individual Internal Medicine Physician · NPI 1619691045

  72 Cudworth Rd, Webster, MA 01570-3157 · (508) 461-0011

• Grabias Medical Group PC

  Organization Internal Medicine Physician · NPI 1578570537

  340 Thompson Rd Ste 108, Webster, MA 01570 · (508) 949-1988

• Piotr Grabias, MD

  Individual Internal Medicine Physician · NPI 1508847419

  340 Thompson Rd Ste 108, Webster, MA 01570-1509 · (508) 949-1988

• Dr. Kenneth Frank Guarnieri, MD

  Individual Internal Medicine Physician · NPI 1679547830

  72 Cudworth Rd, Webster, MA 01570-3157 · (508) 461-0011