Dr. Patrick Greiffenstein, 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.

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.

• University Medical Center New Orleans Hospital · New Orleans, LA · listed as Louisiana State University

Colleagues at Louisiana State University School of Medicine in New Orleans Faculty G

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 447 clinicians in the practice; 12 are shown here.

• Dr. Siddhartha Darshan Bajracharya, MD Student in an Organized Health Care Education/Training Program · New Orleans, LA
• Rajasree Pia Chowdry, MD Hematology & Oncology Physician · New Orleans, LA
• Cathi Ellen Fontenot, MD Internal Medicine Physician · New Orleans, LA
• Corey Gregg, MD Hospitalist Physician · New Orleans, LA
• Sarah Elizabeth Griffin, MD Emergency Medicine Physician · New Orleans, LA
• Dr. Michael David Modica, MD Internal Medicine Physician · New Orleans, LA
• Dr. Lucido Luciano Ponce Mejia, MD Diagnostic Radiology Physician · New Orleans, LA
• Dr. James Michael Riopelle, MD Anesthesiology Physician · New Orleans, LA
• Lori M Smith, APRN, FNP Family Nurse Practitioner · Metairie, LA
• Marie E Unruh, MD Surgery Physician · South Bend, IN
• Dr. Milena Vukelic, MD Rheumatology Physician · Bronx, NY
• Dr. James Christopher Watson, MD Surgical Oncology Physician · Sellersville, PA

Other providers in New Orleans

• Dr. Matthew Green, MD

  Individual Student in an Organized Health Care Education/Training Program · NPI 1962203927

  Student / training record New Orleans, LA

• Dr. Genevieve Pierre Greenberg, DDS

  Individual Student in an Organized Health Care Education/Training Program · NPI 1932901535

  Student / training record New Orleans, LA

• Jacob W Greenberg

  Individual Student in an Organized Health Care Education/Training Program · NPI 1689377244

  Student / training record New Orleans, LA

• Haylee Greer

  Individual Student in an Organized Health Care Education/Training Program · NPI 1912889833

  Student / training record New Orleans, LA

• Grayson Matthew Gremillion

  Individual Student in an Organized Health Care Education/Training Program · NPI 1962701854

  Student / training record New Orleans, LA

• Timothy Edward Gressett, MD, PHD

  Individual Student in an Organized Health Care Education/Training Program · NPI 1720872070

  Student / training record New Orleans, LA

• Catherine Gretchen, MD

  Individual Student in an Organized Health Care Education/Training Program · NPI 1912297128

  Student / training record New Orleans, LA

• Alegra Victoria Grieb, MD

  Individual Student in an Organized Health Care Education/Training Program · NPI 1760845317

  Student / training record New Orleans, LA