Semon R Bader, MD

1 location · Golden State Orthopedics and Spine · 186 clinicians in this group

Hospitals listed: Contra Costa Regional Medical Center · 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 A98350 · Current

Licensed to practise in California · since 2006 · expires 2028-08-31 · University of California, Davis School of Medicine.

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

Surgery centers they own

• Porter Ambulatory Surgery CenterSan Ramon, CA18.1% owner since 2020 · accredited by AAAHC
  Initial Accreditation1 inspection · last 2021-02-27
• Sequoia Surgical Center, LP dba Sequoia Surgical PavilionAmbulatory Surgery Center · Walnut Creek, CA2.8% owner since 2010 · accredited by AAAHC
  Accreditation Renewed5 inspections, 1 with deficiencies · last 2024-05-15

3 hospitals

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

• Contra Costa Regional Medical CenterMartinez, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of Contra Costa Health ServicesPatients rate it 3 of 5 · 73% would definitely recommend it
  Overall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.167, 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

$174,944

Medicare paid this office $174,944 for 434 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

434 Original Medicare patients in 2024. Average age 71 · Under 65 10% · 85 and older 6% · Women 61% · Also on Medicaid 26% · Health risk score 0.94. At or below the middle of the specialty; the typical orthopedic surgery clinician is at 1.13.

Conditions among them: High blood pressure 68% · Diabetes 25% · Depression 20% · Coronary heart disease 18% · Chronic kidney disease 16% · Atrial fibrillation 14% · Cancer 12% · COPD 11% · Heart failure 9% · Stroke 7% · Dementia 4%.

The office billed $819,140, Medicare allowed $229,238 and paid $174,944; for 6,883 services of 69 kinds; $1,788 of it was for drugs given in the office and $173,156 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.

$242,823 in 2024

Medicaid paid $242,823 for 1,873 billed services this clinician did in 2024, up to 49 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.

$494

Pharmacies billed $494 in 2024.

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

65 generic and fewer than 11 brand-name prescriptions · $494 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.

$7,892 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.

Medicare did not publish checkup rates for this clinician.

NPI

1750581278

Licence

CA A98350California A98350: Current · expires 2028-08-31

Group

Golden State Orthopedics and Spine

Video visits

Lists video visits

Gender

Male