Crystal Chang, MD

5 locations · Bass Medical Group · John Muir Trauma Physicians Billing Service · Bay Imaging Consultants Medical Group Inc

Hospitals listed: Alta Bates Summit Medical Center · John Muir Medical Center - Concord Campus · John Muir Medical Center - Walnut Creek Campus · San Ramon Regional Medical Center. That is not proof they admit you there this week.

3 plans · 1 carrier

Licence A140488 · Current

Licensed to practise in California · since 2016 · expires 2027-09-30 · Jefferson Medical College of Thomas Jefferson University.

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 Radiology - Diagnostic Radiology

4 hospitals

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

• Alta Bates Summit Medical CenterOakland, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 3 of 5 · 78% would definitely recommend it
  Overall rating: 5 of 5 starsBetter than the national rate — Death rate among surgical inpatients with serious treatable complications: 130.09 (87.72 to 172.46) · 109 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.274, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.227, Oct 2024 – Sep 2025
• John Muir Medical Center - Concord CampusConcord, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of John Muir Health, which runs 3 hospitalsPatients rate it 3 of 5 · 77% would definitely recommend it
  Overall rating: 4 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.235, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.675, Oct 2024 – Sep 2025
• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of John Muir Health, which runs 3 hospitalsPatients rate it 3 of 5 · 77% would definitely recommend it
  Overall rating: 2 of 5 starsWorse than the national rate — Abdominopelvic accidental puncture or laceration rate: 2.01 (1.17 to 2.85) · 2,206 cases, Jul 2022 – Jun 2024Worse than the national rate — Death rate among surgical inpatients with serious treatable complications: 222.42 (177.82 to 267.02) · 120 cases, Jul 2022 – Jun 2024Worse than the national rate — Pressure ulcer rate: 1.4 (0.91 to 1.9) · 9,764 cases, Jul 2022 – Jun 2024Worse than the national rate — SSI - Colon Surgery: 2.734, Oct 2024 – Sep 2025Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.536, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.341, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.455, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.245, Oct 2024 – Sep 2025
• San Ramon Regional Medical CenterSan Ramon, CAAcute Care Hospital · Proprietary · Has an emergency department · Birthing-friendlyPart of Tenet Healthcare, which runs 77 hospitals in 12 statesPatients rate it 3 of 5 · 65% would definitely recommend it
  Overall rating: 4 of 5 starsNo measure marked better or worse than the national rate

$183,008

Medicare paid this office $183,008 for 2,003 people.

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

Procedures year by year

Times billed to Original Medicare each year. A blank year means fewer than 11 people had it, or none: Medicare does not publish smaller counts. Medicare Advantage patients are not included.

Who their Medicare patients are

2,003 Original Medicare patients in 2024. Average age 74 · Under 65 4% · 85 and older 9% · Women 88% · Also on Medicaid 13% · Health risk score 1.13. At or below the middle of the specialty; the typical diagnostic radiology clinician is at 1.7.

Conditions among them: High blood pressure 62% · Cancer 22% · Depression 22% · Diabetes 21% · Chronic kidney disease 20% · Coronary heart disease 17% · Atrial fibrillation 14% · Heart failure 12% · COPD 11% · Stroke 7% · Dementia 6%.

The office billed $935,329, Medicare allowed $204,361 and paid $183,008; for 8,934 services of 101 kinds; $965 of it was for drugs given in the office and $182,043 for care.

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.

$2,838 in 2024

Medicaid paid $2,838 for 97 billed services this clinician did in 2024, up to 24 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.

$18 in 2023

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

A payment is not proof that care is biased.

NPI

1518253012

Licence

CA A140488California A140488: Current · expires 2027-09-30

Group

Bass Medical Group · John Muir Trauma Physicians Billing Service · Bay Imaging Consultants Medical Group Inc

Gender

Female