Sam S. Yang, 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.

Colleagues at Permanente Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 10941 clinicians in the practice; 12 are shown here.

• Jonathan P. Alexander, MD Hospitalist Physician · San Francisco, CA
• Cheryl L. Branson, MD Obstetrics & Gynecology Physician · Mountain View, CA
• Gihan S. Farag, MD Internal Medicine Physician · Vallejo, CA
• Lisa Katherine Gilliam, MD, PHD Endocrinology, Diabetes & Metabolism Physician · Seattle, WA
• Deepak Gurushanthaiah, MD Otolaryngology Physician · Oakland, CA
• Michelle Suzanne Holmes, MD Emergency Medicine Physician · Santa Clara, CA
• Poorab K. Sangani, MD Ophthalmology Physician · Daly City, CA
• Eugene H. Seto, MD Urology Physician · South San Francisco, CA
• James A. Siy, MD Internal Medicine Physician · Folsom, CA
• Jeffrey A. Stenger, MD Hospitalist Physician · Roseville, CA
• Brian P. Tzeng, MD Anesthesiology Physician · South San Francisco, CA
• Katherine Louise Walker, PHD Psychologist · Walnut Creek, CA

Other providers in Walnut Creek

• Edward H. Sweet, MD

  Individual Ophthalmology Physician · NPI 1477631547

  320 Lennon Ln, Walnut Creek, CA 94598-2419 · (925) 906-2000

• Vahid Feiz, MD, Inc

  Organization Ophthalmology Physician · NPI 1699211565

  100 N Wiget Ln Ste 270, Walnut Creek, CA 94598-5988 · (925) 705-7299

• Mr. Allen Zachary Verne, MD

  Individual Ophthalmology Physician · NPI 1093749491

  122 La Casa Via Ste #223, Walnut Creek, CA 94598-3014 · (925) 943-6800

• Dr. Donald Robert Wolff, MD

  Individual Ophthalmology Physician · NPI 1821002619

  2021 Ygnacio Valley Rd Ste C-102, Walnut Creek, CA 94598-3391 · (925) 256-8464