Daniel Louis Aaron, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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
• St Vincent Hospital Hospital · Worcester, MA
• Umass Memorial Health - Harrington Hospital Hospital · Southbridge, MA · listed as Umass Memorial Health-Harrington Hospital Inc
• Umass Memorial Healthalliance Hospitals Hospital · Leominster, MA · listed as Umass Memorial Healthalliance Clinton Hospital Inc
• Umass Memorial Medical Center/University Campus Hospital · Worcester, MA · listed as Umass Memorial Medical Center
• 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.

• Subin G Chirayath, DO Gastroenterology Physician · Norwalk, CT
• Rachel Elizabeth Davis-Martin, PHD Clinical Psychologist · Worcester, MA
• Eileen E. Delaney, MD Student in an Organized Health Care Education/Training Program · Worcester, MA
• Angela Marie Dupuis, FNP Family Nurse Practitioner · Worcester, MA
• Peter Mark Grzesik, DO Anesthesiology Physician · Worcester, MA
• Stephany Khalil Matta, MD Endocrinology, Diabetes & Metabolism Physician · Sturbridge, MA
• David Nesanelis, MD Internal Medicine Physician · Leominster, MA
• Mark Joseph O'Connor, MD Endocrinology, Diabetes & Metabolism Physician · Worcester, MA
• Thomas A Pieters, MD Neurological Surgery Physician · Worcester, MA
• Qadija Habeeb Qadri, DO Infectious Disease Physician · Worcester, MA
• Daniel George Terk, MD Student in an Organized Health Care Education/Training Program · Leominster, MA
• Emily K. Wu, MD Obstetrics Physician · Worcester, MA

Other providers in Worcester

• A Jerome Philbin MD, PC

  Organization Orthopaedic Surgery Physician · NPI 1659319143

  281 Lincoln St, Worcester, MA 01605-2138 · (508) 757-1431

• Philip Aurigemma, MD

  Individual Orthopaedic Surgery Physician · NPI 1346688033

  55 Lake Ave N, Worcester, MA 01655-0002 · (508) 334-1000

• Dr. David C Ayers, MD

  Individual Orthopaedic Surgery Physician · NPI 1235129594

  119 Belmont St Dept OF Orthopedic Surgery, Worcester, MA 01605-2903 · (508) 334-3170

• Dr. Mary Ann Badon, MD

  Individual Orthopaedic Surgery Physician · NPI 1104134402

  55 Lake Ave N, Worcester, MA 01655 · (508) 334-1000

• William B Balcom, MD

  Individual Orthopaedic Surgery Physician · NPI 1639159841

  123 Summer St Ste 320, Worcester, MA 01608 · (508) 368-3140