Dr. Zuzana U Foster, 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. Those with a page here are linked.

• John Muir Medical Center - Concord Campus Hospital · Concord, CA · listed as John Muir Medical Ctr Concord Campus
• San Ramon Regional Medical Center Hospital · San Ramon, CA
• Stanford Health Care Hospital · Stanford, CA
• Stanford Health Care Tri-Valley Hospital · Pleasanton, CA
• John Muir Medical Center - Walnut Creek Campus Hospital · Walnut Creek, CA

Colleagues at Arthritis and Rheumatology Medical Associates Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

• Atul Agrawal, MD Rheumatology Physician · Antioch, CA
• Rashmi B Dixit, MD Rheumatology Physician · Walnut Creek, CA
• Karun Madhav Nair, MD Student in an Organized Health Care Education/Training Program · Chicago, IL
• Dr. David W Wu, MD Rheumatology Physician · Walnut Creek, CA
• Dr. Saba Merchant Ziaee, MD Rheumatology Physician · Walnut Creek, CA

Other providers in Walnut Creek

• Rashmi B Dixit, MD

  Individual Rheumatology Physician · NPI 1811990666

  120 La Casa Via Ste 204, Walnut Creek, CA 94598-3007 · (925) 210-1050

• Dr. John M Loeb, MD

  Individual Rheumatology Physician · NPI 1932106390

  120 La Casa Via Ste 204, Walnut Creek, CA 94598-3007 · (925) 210-1050

• Dr. Midori Jane Nishio, MD

  Individual Rheumatology Physician · NPI 1316010366

  1450 Treat Blvd Ste 200, Walnut Creek, CA 94597-2168 · (925) 280-9400

• Richard D Smith M D Inc

  Organization Rheumatology Physician · NPI 1942537618

  675 Ygnacio Valley Rd Ste A 102, Walnut Creek, CA 94596 · (925) 977-4335

• Dr. Raul Romea, MD

  Individual Rheumatology Physician · NPI 1962408112

  1450 Treat Blvd # 200, Walnut Creek, CA 94597 · (925) 296-9060