Michael Hien Bien, MD

6 locations · California Kidney Specialists · Cua, Gan and Bien Medical Corporation · Cua and Gan Medical Corporation

Hospitals listed: 552552 · 552816 · 552837 · Casa Colina Hospital · Chino Valley Medical Center · Montclair Hospital Medical Center · Pomona Valley Hospital Medical Center · San Antonio Regional Hospital. That is not proof they admit you there this week.

Licence A74264 · Current

Licensed to practise in California · since 2001 · expires 2028-07-31 · University of California, Los Angeles 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 Internal Medicine - Nephrology

5 hospitals

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

• Casa Colina HospitalPomona, CAAcute Care Hospital · Voluntary non-profit - Private · No emergency department79% would definitely recommend it
  No overall ratingNo measure marked better or worse than the national rate
• Chino Valley Medical CenterChino, CAAcute Care Hospital · Proprietary · Has an emergency departmentPart of Prime Healthcare Services, which runs 45 hospitals in 14 statesPatients rate it 2 of 5 · 61% would definitely recommend it
  Overall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.258, Oct 2024 – Sep 2025
• Montclair Hospital Medical CenterMontclair, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Prime Healthcare Services, which runs 45 hospitals in 14 statesPatients rate it 2 of 5 · 58% would definitely recommend it
  Overall rating: 3 of 5 starsNo measure marked better or worse than the national rate
• Pomona Valley Hospital Medical CenterPomona, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Pomona Valley Hospital Medical CenterPatients rate it 2 of 5 · 68% would definitely recommend it
  Overall rating: 3 of 5 starsBetter than the national rate — CMS Medicare PSI 90: Patient safety and adverse events composite: 0.64 (0.33 to 0.96), Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.398, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.389, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.155, Oct 2024 – Sep 2025
• San Antonio Regional HospitalUpland, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of San Antonio Regional HospitalPatients rate it 3 of 5 · 69% would definitely recommend it
  Overall rating: 3 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.375, Oct 2024 – Sep 2025

$386,757

Medicare paid this office $386,757 for 430 people.

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

Who their Medicare patients are

430 Original Medicare patients in 2024. Average age 70 · Under 65 26% · 85 and older 15% · Women 47% · Also on Medicaid 66% · Health risk score 4.97. Sicker patients than 9 in 10 peers; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Diabetes 75% · Chronic kidney disease 75% · Heart failure 54% · Coronary heart disease 46% · Atrial fibrillation 32% · COPD 28% · Depression 28% · Stroke 24% · Dementia 19% · Cancer 14%.

The office billed $900,350, Medicare allowed $487,071 and paid $386,757; for 3,741 services of 32 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.

$149,952 in 2024

Medicaid paid $149,952 for 2,032 billed services this clinician did in 2024, up to 86 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.

$824,358

Pharmacies billed $824,358 in 2024.

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

3,024 generic and 836 brand-name prescriptions · $824,358 in drug cost · 33 antibiotic prescriptions to 24 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.

$688 in 2025