Dr. Allison W. Warren, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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
• Suburban Hospital Hospital · Bethesda, MD

Colleagues at Cardiocare LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 17 clinicians in the practice; 12 are shown here.

• Tara Baker Family Nurse Practitioner · Hagerstown, MD
• Dr. Supria Batra, MD Internal Medicine Physician · Chevy Chase, MD
• Geoffrey John Cole, MD Cardiovascular Disease Physician · Chevy Chase, MD
• Miss. Stephanie W Conn, PAC Medical Physician Assistant · Washington, DC
• Dr. Daphne Evans, MD Internal Medicine Physician · New Haven, CT
• Dr. Jack L. Flyer, MD Cardiovascular Disease Physician · Chevy Chase, MD
• Dr. Martin S. Kanovsky, MD Cardiovascular Disease Physician · Chevy Chase, MD
• Jiyong Lee Cardiovascular Disease Physician · Chevy Chase, MD
• MS. Patricia Ann Matticola, NP Acute Care Nurse Practitioner · Chevy Chase, MD
• Dr. Reza Sanai, MD Cardiovascular Disease Physician · Chevy Chase, MD
• Dr. Viral Ras Sheth, MD Cardiovascular Disease Physician · Goshen, NY
• Shaneke Tharange Weerakoon, MD Cardiovascular Disease Physician · Washington, DC

Other providers in Washington

• Rohan Kiran Patel, MD

  Individual Clinical Cardiac Electrophysiology Physician · NPI 1932462215

  110 Irving St NW Medstar Heart & Vascular Institute Ste 6D, Washington, DC 20010-3017 · (202) 877-9090

• Dr. Elizabeth D Sherwin, MD

  Individual Clinical Cardiac Electrophysiology Physician · NPI 1194924753

  111 Michigan Ave NW Division Of Cardiology, Washington, DC 20010-2916 · (202) 476-6771

• Allen J. Solomon, MD

  Individual Clinical Cardiac Electrophysiology Physician · NPI 1033282843

  2150 Pennsylvania Ave NW, Washington, DC 20037-3201 · (202) 741-2222

• Apostolos Tsimploulis

  Individual Clinical Cardiac Electrophysiology Physician · NPI 1043624570

  110 Irving St NW, Washington, DC 20010-3017 · (202) 877-7685

• Washington Electrophysiology LLC

  Organization Clinical Cardiac Electrophysiology Physician · NPI 1285663427

  106 Irving St NW Ste 420, Washington, DC 20010-2927 · (202) 722-6363