Roy Kazuo Sumida, 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.

• Kaiser Foundation Hospital-Santa Rosa Hospital · Santa Rosa, CA · listed as Kaiser Foundation Hospitals

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.

• Gayatri Bharadhwaj, MD Gastroenterology Physician · Fremont, CA
• Michael A. Emerzian, MD Internal Medicine Physician · Roseville, CA
• Dr. I-Yeh Gong, MD Hematology & Oncology Physician · Sacramento, CA
• Chandu A. Karadi, MD Emergency Medicine Physician · San Jose, CA
• Lorin M. Kreitzer, DO Hospitalist Physician · Redwood City, CA
• Jeffrey C. Liu, MD Ophthalmology Physician · Chicago, IL
• David T. Quach, MD Hospitalist Physician · Manteca, CA
• Lisa G. Sherman, MD Obstetrics & Gynecology Physician · Oakland, CA
• Jennifer L. Slovis, MD Family Medicine Physician · Oakland, CA
• Lloyd E. Stockey, MD Internal Medicine Physician · Oakland, CA
• Jasdeep K. Virdi, MD Internal Medicine Physician · Modesto, CA
• Morgan S. Waters, MD Internal Medicine Physician · Sacramento, CA

Other providers in Santa Rosa

• Mark J Popovich, MD

  Individual Body Imaging Physician · NPI 1245320704

  3883 Airway Dr Ste 100, Santa Rosa, CA 95403-1672 · (707) 521-4480

• David Howard Schmidt, MD

  Individual Body Imaging Physician · NPI 1114017571

  121 Sotoyome St, Santa Rosa, CA 95405-4823 · (707) 546-4062

• Michael Dixon Shane, MD

  Individual Body Imaging Physician · NPI 1154401990

  121 Sotoyome St, Santa Rosa, CA 95405-4823 · (707) 546-4062

• Gary Thomas Shaw, MD

  Individual Body Imaging Physician · NPI 1568542306

  121 Sotoyome St, Santa Rosa, CA 95405-4823 · (707) 546-4062