Mary K Cardoza, MD

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

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

3 plans · 1 carrier

Licence G65662 · Current

Licensed to practise in California · since 1989 · expires 2027-03-31 · University of California, Los Angeles School of Medicine.

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

Surgery centers they own

• Bay Area Surgical Specialists Services, LLC DBA BASS Surgery CenterAmbulatory Surgery Center · Walnut Creek, CA0.83% owner since 2024 · accredited by AAAHC
  Initial Accreditation2 inspections, 2 with deficiencies · last 2025-06-27

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

2 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

$32,617

Medicare paid this office $32,617 for 98 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

98 Original Medicare patients in 2024. Average age 74 · Women 80% · Also on Medicaid 28% · Health risk score 1.21. At or below the middle of the specialty; the typical general surgery clinician is at 1.69.

Conditions among them: High blood pressure 68% · Cancer 54% · Diabetes 29% · Atrial fibrillation 24% · Depression 23% · Chronic kidney disease 18% · Coronary heart disease 15%.

The office billed $143,563, Medicare allowed $42,171 and paid $32,617; for 177 services of 27 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.

$3,746 in 2024

Medicaid paid $3,746 for 26 billed services this clinician did in 2024, up to 13 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.

$1,512

Pharmacies billed $1,512 in 2024.

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

Opioids were 54% of their Part D prescriptions (37 of 68) in 2024. Above the middle of the specialty; the typical general surgery clinician is at 34%. Surgeons prescribe little besides pain medicine after an operation, so their opioid share runs high.

67 generic and fewer than 11 brand-name prescriptions · $1,512 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.

$28 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

1710936067

Licence

CA G65662California G65662: Current · expires 2027-03-31

Trained

University of California, Geffen School of Medicine, 1987 · 39 years ago

Group

Bass Medical Group

Gender

Female