Gwendolen Y Chang, MD

1 location · West Coast Kidney · 56 clinicians in this group

Hospitals listed: 052675 · 052742 · 552749 · Eden Medical Center · Highland Hospital. That is not proof they admit you there this week.

21 plans · 5 carriers

Licence A106132 · Current

Licensed to practise in California · since 2008 · expires 2028-08-31 · Stanford University School of Medicine.

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

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

• American Board of Internal Medicine - Hospice and Palliative Medicine
• American Board of Internal Medicine - Internal Medicine
• American Board of Internal Medicine - Nephrology

2 hospitals

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

• Eden Medical CenterCastro Valley, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 3 of 5 · 75% would definitely recommend it
  Overall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.122, Oct 2024 – Sep 2025
• Highland HospitalOakland, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency department · Birthing-friendlyPart of Alameda Health System, which runs 4 hospitalsPatients rate it 3 of 5 · 70% would definitely recommend it
  Overall rating: 1 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.568, Oct 2024 – Sep 2025

$295,114

Medicare paid this office $295,114 for 488 people.

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

Who their Medicare patients are

488 Original Medicare patients in 2024. Average age 74 · Under 65 14% · 85 and older 18% · Women 49% · Also on Medicaid 73% · Health risk score 4.52. Above the middle of the specialty; the typical nephrology clinician is at 4.01.

Conditions among them: High blood pressure 75% · Chronic kidney disease 75% · Diabetes 67% · Heart failure 49% · Coronary heart disease 38% · COPD 31% · Atrial fibrillation 30% · Depression 26% · Stroke 23% · Dementia 17% · Cancer 14%.

The office billed $805,591, Medicare allowed $386,803 and paid $295,114; for 2,601 services of 35 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.

$99,269 in 2024

Medicaid paid $99,269 for 1,508 billed services this clinician did in 2024, up to 40 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.

$942,374

Pharmacies billed $942,374 in 2024.

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

Opioids were 0% of their Part D prescriptions (0 of 2,140) in 2024. At or below the middle of the specialty; the typical nephrology clinician is at 0%.

1,581 generic and fewer than 11 brand-name prescriptions · $942,374 in drug cost · 40 antibiotic prescriptions to 24 people.

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.

$1,616 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.

NPI

1386807402

Licence

CA A106132California A106132: Current · expires 2028-08-31

Trained

Stanford University School of Medicine, 2007 · 19 years ago

Group

West Coast Kidney

Video visits

Lists video visits

Gender

Female