Mohamad Z Koubeissi, 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.

• George Washington Univ Hospital Hospital · Washington, DC · listed as George Washington University Hospital

Colleagues at Medical Faculty Associates, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 684 clinicians in the practice; 12 are shown here.

• Dr. Benjamin C. Blatt, MD Internal Medicine Physician · Washington, DC
• Dr. Geneva Leigh Cleveland, OD Optometrist · Washington, DC
• Dr. Malcolm Mark Desouza, MD Obstetrics & Gynecology Physician · Washington, DC
• Joseph Devlin Surgery Physician · Baltimore, MD
• Mohamed Ghallab, MD Family Medicine Physician · Flint, MI
• Kalpana Gopalswamy, MD Internal Medicine Physician · Pittsburgh, PA
• Claudia Alexander Karakashian, PA-C Physician Assistant · Washington, DC
• Martin Stanley Kneller, MD Nuclear Radiology Physician · Washington, DC
• MS. Meagan Amy Matteson, RN, CRNP Women's Health Nurse Practitioner · Washington, DC
• Emily Murphy Student in an Organized Health Care Education/Training Program · Washington, DC
• Joseph Daniel Pauly, MD Student in an Organized Health Care Education/Training Program · New Haven, CT
• Mrs. Susan L Robson, NURSEPRACTITIONER Adult Health Nurse Practitioner · Washington, DC

Other providers in Washington

• Sarah Ganji, MD

  Individual Epilepsy Physician · NPI 1205247103

  1200 Pecan St SE, Washington, DC 20032-2652 · (771) 444-6200

• Thuy Nguyen, MD

  Individual Epilepsy Physician · NPI 1043673916

  4200 Wisconsin Ave NW Ste 4, Washington, DC 20016-2143 · (202) 243-3400

• Victoria Vinarsky

  Individual Epilepsy Physician · NPI 1164953477

  2150 Pennsylvania Ave NW, Washington, DC 20037-3201 · (202) 741-2700