Marianne H Cowley, 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.

• Johns Hopkins Hospital, The Hospital · Baltimore, MD · listed as The Johns Hopkins Hospital

Colleagues at Johns Hopkins University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2855 clinicians in the practice; 12 are shown here.

• Valsamo Anagnostou, MD-PHD Medical Oncology Physician · Baltimore, MD
• Oscar Joseph Bienvenu, MD Psychiatry Physician · Baltimore, MD
• Dr. Laura Chin, MD Anesthesiology Physician · Baltimore, MD
• Charles George Eberhart, MD Anatomic Pathology & Clinical Pathology Physician · Baltimore, MD
• Cynthia Dianne Fields, MD Psychiatry Physician · Baltimore, MD
• Dr. Ankit Garg, MD, PHD Internal Medicine Physician · Baltimore, MD
• Nia Leak, MD Obstetrics & Gynecology Physician · Columbia, MD
• Melissa Leimkuehler, MD Diagnostic Radiology Physician · Baltimore, MD
• Geoffrey Ling, MD Critical Care Medicine (Anesthesiology) Physician · Baltimore, MD
• Samantha Pitts, MD Internal Medicine Physician · Lutherville, MD
• Natarajan Ravendhran, MD Gastroenterology Physician · Catonsville, MD
• Elias S Sotirchos, MD Neurology Physician · Baltimore, MD

Other providers in Baltimore

• Stan L Coleman, MD

  Individual Ophthalmology Physician · NPI 1912945056

  600 N Wolfe St, Baltimore, MD 21287-0005 · (410) 955-5080

• Dr. Mary Louise Collins, MD

  Individual Ophthalmology Physician · NPI 1063431724

  6569 N Charles St Ste 505, Baltimore, MD 21204-6831 · (443) 849-2196

• Megan Elizabeth Collins, MD

  Individual Ophthalmology Physician · NPI 1295879690

  1800 Orleans St, Baltimore, MD 21264-3644 · (410) 502-2037

• Nathan Congdon, MD

  Individual Ophthalmology Physician · NPI 1871549311

  4940 Eastern Ave, Baltimore, MD 21224-2735 · (410) 550-2360

• Dr. Earl Randy Craven, MD

  Individual Ophthalmology Physician · NPI 1457354821

  600 N Wolfe St, Baltimore, MD 21287-0005 · (410) 955-5000

• Rania Mokbel Dahabreh, MD

  Individual Ophthalmology Physician · NPI 1760675243

  600 N.wolfe St The Wilmer Institute 233 Johns Hopkins Hospital, Baltimore, MD 21287-9028 · (410) 955-8314

• Yassine Daoud, MD

  Individual Ophthalmology Physician · NPI 1376710152

  600 N Wolfe St Wilmer Eye Institute Maumenee 3rd Fl, Baltimore, MD 21287-0005 · (410) 910-2330

• Daniel Daroszewski, MD

  Individual Ophthalmology Physician · NPI 1073049987

  600 N Wolfe Street Woods 375, Baltimore, MD 21287-2128 · (410) 955-5490