Jennifer O Chan, MD

3 locations · Bass Medical Group · 292 clinicians in this group

Hospitals listed: John Muir Medical Center - Concord Campus · John Muir Medical Center - Walnut Creek Campus · Washington Hospital. That is not proof they admit you there this week.

3 plans · 1 carrier

Licence A87218 · Current

Licensed to practise in California · since 2004 · expires 2028-05-31 · University of Southern California Keck 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 Surgery - Surgery
• American Board of Thoracic Surgery - Thoracic and Cardiac Surgery

3 hospitals

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

• 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
• Washington HospitalFremont, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency department · Birthing-friendlyPart of Washington Hospital Healthcare SystemPatients rate it 3 of 5 · 71% would definitely recommend it
  Overall rating: 2 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.188, 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): 0.164, Oct 2024 – Sep 2025

$49,375

Medicare paid this office $49,375 for 68 people.

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

Procedures Medicare counted

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

68 Original Medicare patients in 2024. Average age 74 · Women 54% · Also on Medicaid 22% · Health risk score 1.55. At or below the middle of the specialty; the typical thoracic surgery clinician is at 1.74.

Conditions among them: High blood pressure 75% · Cancer 46% · COPD 31% · Diabetes 26% · Coronary heart disease 26% · Atrial fibrillation 26% · Chronic kidney disease 22% · Depression 22% · Heart failure 16%.

The office billed $235,599, Medicare allowed $62,232 and paid $49,375; for 187 services of 47 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.

$923

Pharmacies billed $923 in 2024.

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

Opioids were 66% of their Part D prescriptions (27 of 41) in 2024. Too few prescriptions to judge: with under about 50 a year, a handful of patients can swing this share.

36 generic and fewer than 11 brand-name prescriptions · $923 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.

$8,714 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

1265634687

Licence

CA A87218California A87218: Current · expires 2028-05-31

Group

Bass Medical Group

Video visits

Lists video visits

Gender

Female