Dr. Daniel C Brennan, 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.

• Barnes Jewish Hospital Hospital · Saint Louis, MO
• Johns Hopkins Hospital, The Hospital · Baltimore, MD · listed as The Johns Hopkins Hospital
• Luminis Health Anne Arundel Medical Center, Inc Hospital · Annapolis, MD
• Wellspan York Hospital Hospital · York, PA · listed as York 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.

• Dr. Nikhil Bhagat, MD Vascular & Interventional Radiology Physician · Baltimore, MD
• Dr. Dao-Fu Dai, MDPHD Anatomic Pathology Physician · Baltimore, MD
• Gregory Bruce Diette, MD Pulmonary Disease Physician · Baltimore, MD
• Dr. David W Eisele, MD Otolaryngology Physician · Baltimore, MD
• Philippe Edmond Gailloud, MD Vascular & Interventional Radiology Physician · Baltimore, MD
• Anthony L. Guerrerio Jr., MD, PHD Pediatrics Physician · Baltimore, MD
• Dr. Christopher Joseph Hammond, MD Child & Adolescent Psychiatry Physician · Baltimore, MD
• Mrs. Lynn Hause, PA-C Physician Assistant · Baltimore, MD
• Dr. Dawn Laporte, MD Orthopaedic Hand Surgery Physician · Baltimore, MD
• Debra Love, CRNP Nurse Practitioner · Baltimore, MD
• Arun Venkatesan, MD Neurology Physician · Baltimore, MD
• Glenn T Wetzel, MD Clinical Cardiac Electrophysiology Physician · Memphis, TN

Other providers in Baltimore

• Baltimore Renal Associates

  Organization Nephrology Physician · NPI 1548300494

  5820 York Rd Ste 102, Baltimore, MD 21212-3610 · (410) 433-0040

• Hiba M Barghouthi, MD

  Individual Nephrology Physician · NPI 1639134299

  4940 Eastern Ave, Baltimore, MD 21224-2735 · (410) 550-0979

• Adam Richard Berliner, MD

  Individual Nephrology Physician · NPI 1881666337

  5601 Loch Raven Blvd Ste 3 North Nephrology Center OF Maryland, Baltimore, MD 21239-2905 · (443) 444-3775

• Jonathan A. Bolanos, MD

  Individual Nephrology Physician · NPI 1952507261

  22 S Greene St, Baltimore, MD 21201-1590 · (410) 328-5720

• Gary R Briefel, MD

  Individual Nephrology Physician · NPI 1801853304

  4940 Eastern Ave, Baltimore, MD 21224-2735 · (410) 550-1800

• Dr. Joselito M Cabacar, MD

  Individual Nephrology Physician · NPI 1356362594

  200 E 33rd St Ste 523, Baltimore, MD 21218-3322 · (410) 235-9382

• Calvert Nephrology Group, LLC

  Organization Nephrology Physician · NPI 1831488063

  3333 N Calvert St Ste 585, Baltimore, MD 21218-2867 · (410) 261-8532

• Dr. Valeriu Cebotaru, MD

  Individual Nephrology Physician · NPI 1326220468

  22 S Greene St, Baltimore, MD 21201-1544 · (410) 328-5720