Marco Valentin Perez, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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.

• Stanford Health Care Hospital · Stanford, CA
• Stanford Health Care Tri-Valley Hospital · Pleasanton, CA
• Enloe Health Hospital · Chico, CA

Colleagues at Stanford Health Care

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3085 clinicians in the practice; 12 are shown here.

• Kevin Kai Chih Chang, MD Internal Medicine Physician · Stanford, CA
• David Franklin Fiorentino, MD Dermatology Physician · Stanford, CA
• Abigail Joanne Goetz, PA-C Physician Assistant · Stanford, CA
• Jison Hong, MD Internal Medicine Physician · Stanford, CA
• Nancy Jiang Otolaryngology Physician · Stanford, CA
• David Andrew Kim, MD Emergency Medicine Physician · Stanford, CA
• Kate Luenprakansit, MD Internal Medicine Physician · Stanford, CA
• Deepu Madduri, MD Internal Medicine Physician · Stanford, CA
• Peter Dean Poullos, MD Diagnostic Radiology Physician · Stanford, CA
• Rebecca Dawn Walker, MD Emergency Medicine Physician · Stanford, CA
• Katherine Elmire Williams, MD Psychiatry Physician · Stanford, CA
• Mechele Magpusao Wu, NP Adult Health Nurse Practitioner · Stanford, CA

Other providers in Stanford

• Girish Ananth Narayan, MD

  Individual Cardiovascular Disease Physician · NPI 1912061615

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Andrew Thai Nguyen, MD

  Individual Cardiovascular Disease Physician · NPI 1003436593

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-6661

• Patricia Kim Phuong Nguyen, MD

  Individual Cardiovascular Disease Physician · NPI 1366629958

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Jack William O'Sullivan, MD

  Individual Cardiovascular Disease Physician · NPI 1952930570

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Erik Tyler Price, MD

  Individual Cardiovascular Disease Physician · NPI 1770783177

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Krishna Pundi

  Individual Cardiovascular Disease Physician · NPI 1891158200

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000

• Azad Raiesdana, MD

  Individual Cardiovascular Disease Physician · NPI 1497094171

  300 Pasteur Dr, Stanford, CA 94305 · (650) 518-9773

• Sameer Raina, MD

  Individual Cardiovascular Disease Physician · NPI 1063729580

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 723-4000