Robert T Chang, 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.

• 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.

• Hilarey Rf Bhatt, MD Internal Medicine Physician · Stanford, CA
• Stephen Chang, MD, PHD Internal Medicine Physician · Stanford, CA
• May Chien, MD Hematology (Internal Medicine) Physician · Palo Alto, CA
• Katherine P Eisen, PHD Psychologist · Palo Alto, CA
• Joseph Derek Forrester, MD Surgery Physician · Palo Alto, CA
• Jeffrey Louis Goldberg, MD Ophthalmology Physician · Stanford, CA
• Michelle Hauser, MD Internal Medicine Physician · Palo Alto, CA
• Fadi George Lakkis, MD Nephrology Physician · Stanford, CA
• Rebecca Kate Miller-Kuhlmann, MD Electrodiagnostic Medicine Physician · Stanford, CA
• Linda Nayeli Morimoto, MD Diagnostic Radiology Physician · Stanford, CA
• Jon-Paul Pepper, MD Facial Plastic Surgery Physician · Stanford, CA
• Ruth Eden Yemane, MD Obstetrics & Gynecology Physician · Stanford, CA

Other providers in Stanford

• Eleanor Madison Burton, MD

  Individual Ophthalmology Physician · NPI 1982240685

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

• Bertan Deniz Cakir, MD

  Individual Ophthalmology Physician · NPI 1477182871

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

• Natalia Fijalkowski Callaway, MD

  Individual Ophthalmology Physician · NPI 1891109294

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

• Dolly Shuo-Teh Chang, MD

  Individual Ophthalmology Physician · NPI 1437577186

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

• Sean Michael Collon, MD

  Individual Ophthalmology Physician · NPI 1033679840

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

• Charles Meno Deboer, MD

  Individual Ophthalmology Physician · NPI 1134649973

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

• Shazia Dharssi, MD

  Individual Ophthalmology Physician · NPI 1669838553

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

• Diana V DO, MD

  Individual Ophthalmology Physician · NPI 1245270313

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