Christopher Tsung-Jer Chen, 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.

• Stanford Health Care Hospital · Stanford, 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.

• Bertan Deniz Cakir, MD Ophthalmology Physician · Stanford, CA
• Andrew Anthony Gomella, MD Diagnostic Radiology Physician · Stanford, CA
• Kriti Gupta, MD Pediatrics Physician · Stanford, CA
• Samuel Hayward, PSYD Clinical Psychologist · Stanford, CA
• Joo Young Kim, PA-C Surgical Physician Assistant · Stanford, CA
• Ilyssa Narisse Padua, NP Nurse Practitioner · Stanford, CA
• Darcy Lee Pratt, NP Nurse Practitioner · Stanford, CA
• Myleen Dumagan Romarate, NP Acute Care Nurse Practitioner · Palo Alto, CA
• Maria Norma Villalon Landeros, MD Family Medicine Physician · Stanford, CA
• Alexis Rose Grippi Wasserman, CRNA Registered Nurse · Stanford, CA
• Chad Share Weldy, MD Internal Medicine Physician · Stanford, CA
• May Yang, MD Anesthesiology Physician · Stanford, CA

Other providers in Stanford

• Spencer Michael Chang, MD

  Individual Internal Medicine Physician · NPI 1275160368

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

• Stephen Chang, MD, PHD

  Individual Internal Medicine Physician · NPI 1417240227

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

• Tara I-Hsin Chang, MD

  Individual Internal Medicine Physician · NPI 1437166592

  300 Pasteur Dr, Stanford, CA 94305-2200 · (650) 725-4000

• Amina Chaudhry, MD

  Individual Internal Medicine Physician · NPI 1336679166

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

• Chwen-Yuen Angie Chen, MD

  Individual Internal Medicine Physician · NPI 1114100476

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

• Dr. Connie E-Jean Chen, MD

  Individual Internal Medicine Physician · NPI 1144586199

  300 Pasteur Dr Grant S101, Stanford, CA 94305-2200 · (650) 723-6661

• Debbie Catherine Chen, MD

  Individual Internal Medicine Physician · NPI 1689099715

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

• Doris Pao-Chin Chen, MD

  Individual Internal Medicine Physician · NPI 1013273283

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