Dongyan Liu, 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.

• Frederick Health Hospital Hospital · Frederick, MD · listed as Frederick Health Hospital Inc
• Greater Baltimore Medical Center Hospital · Baltimore, MD

Colleagues at Greater Baltimore Medical Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 348 clinicians in the practice; 12 are shown here.

• Oluyemi Abiodun, MD Internal Medicine Physician · Baltimore, MD
• Aderinsola Oluwaseun Ademiluyi, MD Internal Medicine Physician · Altoona, PA
• Mrs. Jordan Cassella, PA-C Medical Physician Assistant · Towson, MD
• Rhett Gerard Paras Dimaano, MD Hospitalist Physician · Baltimore, MD
• Murugesan Manivasagam, CRNP Hospitalist Physician · Bel Air, MD
• Colin Russell, MD Internal Medicine Physician · Charleston, SC
• Rajani S Tadimalla, MD Family Medicine Physician · Westminster, MD
• Elissa Trieu Student in an Organized Health Care Education/Training Program · Atlanta, GA
• Dr. Stephanie Regina Wappel, MD Critical Care Medicine (Internal Medicine) Physician · Towson, MD
• Danya Waqfi, MD Internal Medicine Physician · Towson, MD
• Joanne K. Wills, MD Family Medicine Physician · Baltimore, MD
• Ashley Yuen, MD Family Medicine Physician · Towson, MD

Other providers in Frederick

• Dr. Kenneth Alvin Bertram, MD

  Individual Hematology & Oncology Physician · NPI 1336227628

  1434 Porter St Barquist Army Health Clinic, Frederick, MD 21702-9210 · (301) 619-4666

• Dr. Elhamy D. Eskander, MD

  Individual Hematology & Oncology Physician · NPI 1528050473

  1562 Opossumtown Pike, Frederick, MD 21702-4337 · (301) 662-8477

• Frederick Oncology Hematology Associates, PC

  Organization Hematology & Oncology Physician · NPI 1457403644

  46 Bthomas Johnson Dr Ste 200, Frederick, MD 21702-4300 · (301) 695-6777

• Dr. Amr Z Hegazi, MD

  Individual Hematology & Oncology Physician · NPI 1366443152

  46B Thomas Johnson Dr Ste 200, Frederick, MD 21702-4300 · (301) 695-6777

• Maryland Oncology Hematology

  Organization Hematology & Oncology Physician · NPI 1982558904

  112 Thomas Johnson Dr Ste 250, Frederick, MD 21702-4972 · (301) 695-6777

• Dr. Giovanni Melillo, MD

  Individual Hematology & Oncology Physician · NPI 1205371135

  2554 Bear Den Rd, Frederick, MD 21701-5230 · (301) 639-2190

• Dr. Brian O'Connor, MD

  Individual Hematology & Oncology Physician · NPI 1174515050

  1562 Opossumtown Pike, Frederick, MD 21702-4337 · (301) 662-8477

• Yun W. Oh, MD

  Individual Hematology & Oncology Physician · NPI 1194898791

  46B Thomas Johnson Dr Ste 200, Frederick, MD 21702-5104 · (301) 695-6777