James Kalyvas, 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.

• Ochsner Medical Center Acute Hospital · New Orleans, LA · listed as Ochsner Medical Center
• Ochsner Medical Center-Hancock Hospital · Bay Saint Louis, MS · listed as Ochsner Medical Center - Hancock LLC

Colleagues at Ochsner Clinic LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2842 clinicians in the practice; 12 are shown here.

• Bonnie Keller Alvey, CNS Adult Health Clinical Nurse Specialist · New Orleans, LA
• Rachel Anne Calix, MD Neuro-ophthalmology Physician · New Orleans, LA
• Jessica L Dahle, MD Surgery Physician · New Orleans, LA
• Emilio Jose Fabian Corona, MD Student in an Organized Health Care Education/Training Program · Baton Rouge, LA
• Brandi Barrios Fincher, NP Family Nurse Practitioner · New Orleans, LA
• Brian J Fish, MD Student in an Organized Health Care Education/Training Program · New Orleans, LA
• Danielle Kay, MD Student in an Organized Health Care Education/Training Program · New Orleans, LA
• Mr. Gerardo E Ortega, CRNA Certified Registered Nurse Anesthetist · New Orleans, LA
• Heather S. Rezza, FNP Family Nurse Practitioner · Slidell, LA
• Dr. Leslie Lousteau Weeks, MD Obstetrics & Gynecology Physician · Slidell, LA
• Tong Yang, BACHELOROFMEDICINE Anatomic Pathology & Clinical Pathology Physician · Metairie, LA
• Auzhand Yeganeh Zonozy, MD Diagnostic Radiology Physician · Fort Worth, TX

Other providers in New Orleans

• Clarence S Greene Jr., MD

  Individual Neurological Surgery Physician · NPI 1215960059

  200 Henry Clay Ave Neurosurgery Dept, New Orleans, LA 70118-5720 · (504) 896-9568

• Hill Country Monitoring LLC

  Organization Neurological Surgery Physician · NPI 1144681800

  650 Poydas St Ste 1400, New Orleans, LA 70130 · (844) 743-5552

• Dr. Kendrick Dewayne Johnson, MD

  Individual Neurological Surgery Physician · NPI 1790122141

  1430 Tulane Ave # 8047, New Orleans, LA 70112-2632 · (504) 988-3524

• Lora Kahn, MD

  Individual Neurological Surgery Physician · NPI 1326332388

  1514 Jefferson Hwy, New Orleans, LA 70121 · (504) 842-4064

• Dr. Sassan Keshavarzi, MD

  Individual Neurological Surgery Physician · NPI 1972754927

  1415 Tulane Ave Fl 5, New Orleans, LA 70112-2600 · (504) 988-5263

• Pervez Ahmad Khan, MBBS

  Individual Neurological Surgery Physician · NPI 1023211760

  1415 Tulane Ave Fl 5, New Orleans, LA 70112-2600 · (504) 988-5561

• Jennifer A. Kosty, MD

  Individual Neurological Surgery Physician · NPI 1295093482

  1514 Jefferson Hwy, New Orleans, LA 70121 · (504) 842-4033

• William Mitchell Mangham

  Individual Neurological Surgery Physician · NPI 1609230788

  1514 Jefferson Hwy, New Orleans, LA 70121-2429 · (504) 842-4033