Michael Hien Bien, M.D.
NPI 1689680654ActiveIndividual· Internal Medicine, Nephrology· San Dimas, CA
Internal Medicine, Nephrology (M.D.) in San Dimas, California, trained at Irvine California College of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $824,358 for 3,909 claims, against $386,757 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 8 companies reporting payments in 2025, $688.39 in all, mostly food and beverage.
Overview
| NPI | 1689680654 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 31, 2006 |
| Last updated in NPPES | Mar 16, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A74264 | CA |
| Internal Medicine | 207R00000X | A74264 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 430 |
|---|---|
| Services billed | 3,741 across 32 procedure codes |
| Paid by Medicare | $386,757 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,909 · 5,964 30-day fills |
|---|---|
| Patients | 295 |
| Total drug cost | $824,358 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | Irvine California College of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
| Telehealth | Offers telehealth |
Medical groups
- California Kidney SpecialistsSan Dimas, CA · 16 clinicians
- Cua and Gan Medical CorporationWest Covina, CA · 4 clinicians
- Cua, Gan and Bien Medical CorporationWest Covina, CA · 3 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Chino Valley Medical CenterChino, CA
- Montclair Hospital Medical CenterMontclair, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Other facilities
- Ontario Holt Dialysis Center, Inc.Dialysis facility · Ontario, CA
- Pomona Dialysis Center, Inc.Dialysis facility · Pomona, CA
- San Dimas Dialysis Center, Inc.Dialysis facility · San Dimas, CA
- Casa Colina Hosp for Rehab MedicineInpatient rehabilitation facility · Pomona, CA
Industry payments (Open Payments)
- 2025$688.39 · 25 payments from 8 companies
- 2024$504.30 · 15 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $296.26 | 11 |
| Akebia Therapeutics Inc | $148.47 | 3 |
| Amgen Inc. | $91.15 | 4 |
| Novo Nordisk Inc | $60.00 | 3 |
| Cormedix Inc. | $30.22 | 1 |
What the 2025 payments were for
- Food and Beverage$688.39 · 25 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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