Dr. Ernst Markus Klaus, MBCHB, FRCPCRHEUM

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.

• Adventhealth Tampa Hospital · Tampa, FL · listed as University Community Hospital, Inc
• Adventhealth Wesley Chapel Hospital · Wesley Chapel, FL · listed as Pasco-Pinellas Hillsborough Community Health System Inc
• Morton Plant Hospital Hospital · Clearwater, FL · listed as Morton Plant Mease Hospital

Colleagues at American Arthritis and Rheumatology Associates LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 74 clinicians in the practice; 12 are shown here.

• Jeffrey A Alper, MDPA Rheumatology Physician · Naples, FL
• Alain Alvarez Rheumatology Physician · Naples, FL
• Amina P Chatha, MD Internal Medicine Physician · Avon Park, FL
• Makayla Ciavardone, AGACNP-BC Nurse Practitioner · Avon Park, FL
• Dr. Steven Lee Feldman, MD Rheumatology Physician · Tamarac, FL
• Mrs. Alissa Gwen Ledgerwood, ARNP Family Nurse Practitioner · Orlando, FL
• Jaime A Pachon, MD Rheumatology Physician · South Miami, FL
• Gina Prakash, MD Rheumatology Physician · Plant City, FL
• Mrs. Marissa Prezzemolo, APRN, FNP-BC Family Nurse Practitioner · Coral Springs, FL
• Irfan Raheem, MD Rheumatology Physician · Plantation, FL
• Dr. William A Sunshine, MD Rheumatology Physician · Boca Raton, FL
• Dr. Suyien Zhaz-Leitner, MD Rheumatology Physician · Naples, FL

Other providers in Lutz

• Remission Rheumatology, PLLC

  Organization Rheumatology Physician · NPI 1578413357

  25200 Sawyer Francis Ln Ste 123, Lutz, FL 33559-6947 · (904) 585-7678

• Stride Advantage LLC

  Organization Rheumatology Physician · NPI 1306692819

  2965 Pearson James Pl, Lutz, FL 33559 · (813) 214-5420