Catherine Hall Van Poznak, 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.

• University Of Michigan Health System Hospital · Ann Arbor, MI

Colleagues at Regents of the University of Michigan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3271 clinicians in the practice; 12 are shown here.

• Anne Elizabeth Baetzel, MD Anesthesiology Physician · Ann Arbor, MI
• Matthew Scott Davenport, MD Diagnostic Radiology Physician · Ann Arbor, MI
• Dr. Evan A Farkash, MD, PHD Anatomic Pathology Physician · Ann Arobr, MI
• Dr. Samuel Donovan Kaffenberger, MD Urology Physician · Ann Arbor, MI
• Shafaq Khairi, MD Internal Medicine Physician · Ann Arbor, MI
• Ashley Jeanell Klisz, NP Acute Care Nurse Practitioner · Ann Arbor, MI
• Amit Pandya, MD Diagnostic Radiology Physician · Ann Arbor, MI
• David J Pinsky, MD Internal Medicine Physician · Ann Arbor, MI
• Mohamed Mohamed Helmy Sayyouh, MBBCH Diagnostic Radiology Physician · Ann Arbor, MI
• Brice Taylor, MD Internal Medicine Physician · Ann Arbor, MI
• Dr. Christine M Veenstra, MD Hematology & Oncology Physician · Ann Arbor, MI
• Jason Zhang, MD Ophthalmology Physician · Ypsilanti, MI

Other providers in Ann Arbor

• Dr. Peter Anthony Ubel, MD

  Individual Internal Medicine Physician · NPI 1124113865

  1500 E Medical Center Dr 3rd Fl Taubman Ctr Recp B, Ann Arbor, MI 48109-0352 · (734) 936-5582

• Dr. Iboro Udomon, MD

  Individual Internal Medicine Physician · NPI 1497311708

  380 Parkland Plz, Ann Arbor, MI 48103-6201 · (734) 998-2020

• Dr. Robert Sudhir Vaidya, DO

  Individual Internal Medicine Physician · NPI 1891910105

  1194 Oak Valley Dr Ste 80B, Ann Arbor, MI 48108-8942 · (734) 975-5000

• Nita Valikodath, MD

  Individual Internal Medicine Physician · NPI 1972036069

  1000 Wall St, Ann Arbor, MI 48105-1912 · (734) 764-4190

• Rebecca W Vandyke, MD

  Individual Internal Medicine Physician · NPI 1629157466

  1500 E Medical Center Dr 3rd Fl Taubman Ctr Recp D, Ann Arbor, MI 48109-5362 · (734) 647-5944

• Dr. John Varga, MD

  Individual Internal Medicine Physician · NPI 1528288495

  1500 E Medical Center Dr, Ann Arbor, MI 48109-5000 · (734) 936-4000

• Douglas Stanley Verrill, MD

  Individual Internal Medicine Physician · NPI 1073926861

  325 E Eisenhower Ste 100, Ann Arbor, MI 48108-5744 · (734) 936-7175

• Elizabeth Marie Viglianti, MD

  Individual Internal Medicine Physician · NPI 1447491360

  1500 E Medical Center Dr 3rd Fl Taubman Center Recp C, Ann Arbor, MI 48109-5360 · (734) 647-9342