Joshua Kahwor Au, MD

2 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 A127683 · Current

Licensed to practise in California · since 2013 · expires 2027-10-31 · Yale University 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, CA2.72% 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 Otolaryngology - Otolaryngology

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

$230,266

Medicare paid this office $230,266 for 798 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

798 Original Medicare patients in 2024. Average age 76 · Under 65 3% · 85 and older 13% · Women 57% · Also on Medicaid 11% · Health risk score 0.98. At or below the middle of the specialty; the typical otolaryngology clinician is at 1.19.

Conditions among them: High blood pressure 65% · Diabetes 20% · Coronary heart disease 18% · Atrial fibrillation 17% · Chronic kidney disease 16% · Cancer 16% · Depression 14% · COPD 11% · Heart failure 10% · Stroke 7% · Dementia 4%.

The office billed $878,865, Medicare allowed $306,776 and paid $230,266; for 2,655 services of 49 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.

$5,402 in 2024

Medicaid paid $5,402 for 56 billed services this clinician did in 2024, up to 14 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.

$23,856

Pharmacies billed $23,856 in 2024.

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

Opioids were 1% of their Part D prescriptions (12 of 856) in 2024. At or below the middle of the specialty; the typical otolaryngology clinician is at 4%.

837 generic and 19 brand-name prescriptions · $23,856 in drug cost · 104 antibiotic prescriptions to 63 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.

$110 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.

17 measures · 2023

Medicare asked this office to report how often certain checkups happened in 2023. This is not a grade for the doctor. A specialist’s patients may not need every screening.

What the office says it does

Boxes the office ticked on its Medicare worksheet for 2023. Nobody checks these.

• Agreed to federal review of their records system
• Checks the state prescription-drug database before prescribing
• Did a security review of patient data
• Exchanges records both ways with other health systems
• Improved the patient portal
• Lets patients read their visit notes
• Shows lab and imaging costs when ordering tests
• Uses standard treatment protocols
• Exempt from electronic case reporting
• Exempt from immunization registry reporting

NPI

1366701385

Licence

CA A127683California A127683: Current · expires 2027-10-31

Trained

University of California, Geffen School of Medicine, 2012 · 14 years ago

Group

Bass Medical Group

Gender

Male