Gregory Gagnon

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.

• Frederick Health Hospital Hospital · Frederick, MD · listed as Frederick Health Hospital Inc

Colleagues at Frederick Health Hospital Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 194 clinicians in the practice; 12 are shown here.

• Nicole Alyssa Deshaies, MD Surgery Physician · Frederick, MD
• Mr. Alan J Dombrosky, PA Surgical Physician Assistant · Frederick, MD
• Dr. Andrew Oliver Donelson, MD Internal Medicine Physician · Frederick, MD
• Jeffrey T Gilsdorf, MD Specialist · Frederick, MD
• Achala Shivanthi Gunasena, PA-C Physician Assistant · Frederick, MD
• Uchechi Anozie Iweala, MD Orthopaedic Surgery Physician · Potomac, MD
• Swapna Kanuri, MD Cardiovascular Disease Physician · Arlington, VA
• Mrs. Marsha Naydich, MD Diagnostic Radiology Physician · Eden Prairie, MN
• Cameron Lee Phipps, DPM Foot & Ankle Surgery Podiatrist · Lansdowne, VA
• Bianca Udugampola, MD Internal Medicine Physician · Frederick, MD
• MS. Elizabeth Anne Van Dermark, CRNP-A, WH Women's Health Nurse Practitioner · Frederick, MD
• Mrs. Audrey G. Weitzman, PA Physician Assistant · Germantown, MD

Other providers in Frederick

• Gagnon Oncology, LLC

  Organization Radiation Oncology Physician · NPI 1376814293

  1562 Opossumtown Pike, Frederick, MD 21702-4920 · (240) 566-4500

• Dr. Kwok C. Lee, MD

  Individual Radiation Oncology Physician · NPI 1477550986

  501 W 7th St Ste 2, Frederick, MD 21701-4507 · (240) 566-3400

• Lee Oncology, PA

  Organization Radiation Oncology Physician · NPI 1518014935

  501 W 7th St Ste 2, Frederick, MD 21701-4507 · (301) 694-5517

• Dr. Meredith Hope Wernick, MD, DABR

  Individual Radiation Oncology Physician · NPI 1720386469

  1562 Opossumtown Pike, Frederick, MD 21702-4337 · (240) 566-4500