Robert T Chang, MD

2 locations · Stanford Health Care · 3,152 clinicians in this group

Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.

18 plans · 4 carriers

Licence A108857 · Current

Licensed to practise in California · since 2009 · expires 2028-12-31 · University of Missouri-Kansas City School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

1 licence

• Florida ME99224Medical Doctor · since 2007 · expires 2027-01-31
  ActiveNo board action on this licenceCheck it with the state

We check Colorado, Delaware, Florida, Illinois, Maryland, New Jersey, New York, Tennessee, Texas, Virginia, Washington, plus California above. A state that is not in this list has not been checked, which is not the same as clear.

3 placements

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

• Ophthalmology

Education

• University of Missouri-Kansas City · md2002–2002Medical school

Residency and fellowship

• Bascom Palmer Eye Institute, OtherMIAMI, FL · 2007–2009
• Washington University in St Louis, OphthalmologyST LOUIS, MO · 2004–2007
• Evanston Northwestern Healthcare, Transitional YearEVANSTON, IL · 2003–2004

Hospitals they may admit to

Where the clinician told their state board they may admit and treat patients.

• Out of State · CA

Also licensed in

States the clinician told their board they are also licensed in. Only the states we check are verified.

California · Missouri

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

• Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
  Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024

$273,146

Medicare paid this office $273,146 for 752 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Procedures Medicare counted

Who their Medicare patients are

752 Original Medicare patients in 2024. Average age 77 · Under 65 4% · 85 and older 18% · Women 57% · Also on Medicaid 23% · Health risk score 1.16. Above the middle of the specialty; the typical ophthalmology clinician is at 1.16.

Conditions among them: High blood pressure 66% · Diabetes 31% · Coronary heart disease 20% · Chronic kidney disease 20% · Atrial fibrillation 15% · Cancer 14% · Heart failure 13% · Depression 11% · COPD 9% · Dementia 5% · Stroke 5%.

The office billed $1,794,293, Medicare allowed $364,384 and paid $273,146; for 3,165 services of 50 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

$5,793 in 2024

Medicaid paid $5,793 for 347 billed services this clinician did in 2024, up to 23 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

$300,983

Pharmacies billed $300,983 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

805 generic and 979 brand-name prescriptions · $300,983 in drug cost.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Year by year

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

$20,483 in 2025

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Research money

Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.

Medicare did not publish checkup rates for this clinician.

NPI

1417044280

Licence

CA A108857, FL ME99224, MO 2004011762California A108857: Current · expires 2028-12-31Florida ME99224: Active

Trained

University of Missouri, Columbia School of Medicine, 2002

Group

Stanford Health Care

Gender

Male