Elana Schwam, AGPCNP-BC

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.

Colleagues at President and Fellows of Harvard College

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 95 clinicians in the practice; 12 are shown here.

• Dr. Allen James Brown, PHD Clinical Neuropsychologist · Watertown, MA
• Susan Malkin Kelly, MD Psychiatry Physician · Cambridge, MA
• Denise Lotufo, MSPT Physical Medicine & Rehabilitation Physician · Cambridge, MA
• Caryl S. Mather, MD Internal Medicine Physician · Cambridge, MA
• Mrs. Nyssa Matson-Keats, LICSW Clinical Social Worker · Lexington, MA
• Terryl J Morris-Adams, PA Physician Assistant · Brighton, MA
• Giang T Nguyen, MD Family Medicine Physician · Cambridge, MA
• Dr. Aleksandra Panov Phillips, MD Psychiatry Physician · Cambridge, MA
• David S. Rosenthal, MD Hematology & Oncology Physician · Cambridge, MA
• Christa Smith Sharma, LICSW Clinical Social Worker · Sharon, MA
• Lisa S. Starobin, MD Internal Medicine Physician · Cambridge, MA
• Steven Witte, MD Student in an Organized Health Care Education/Training Program · Cambridge, MA

Other providers in Cambridge

• Mary J Hubbard, APRN

  Individual Primary Care Nurse Practitioner · NPI 1154496313

  1493 Cambridge St Primary Care Ctr, Cambridge, MA 02139-1047 · (617) 665-1536

• Maureen Johnston, NURSEPRACTITIONER

  Individual Primary Care Nurse Practitioner · NPI 1699104828

  25 Carleton St E23, Cambridge, MA 02142-1323 · (617) 253-7625

• Krystal Mershon, FNP-BC

  Individual Primary Care Nurse Practitioner · NPI 1700288388

  725 Concord Ave Ste 3300, Cambridge, MA 02138-1055 · (617) 864-8822

• Kathryn Viona Oas, AGNP

  Individual Primary Care Nurse Practitioner · NPI 1184181380

  94 Hampshire St Unit A, Cambridge, MA 02139-1504 · (801) 602-5524