Michael Hien Bien, M.D.
Nephrology Physician · San Dimas, CA
Michael Hien Bien, M.D. is a nephrology physician with a practice address in San Dimas, California, and NPI 1689680654, issued on Jul 31, 2006. Check the license (California A74264, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Hien Bien
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A74264 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1335 W Cypress Ave, San Dimas, CA 91773
- Phone
- (909) 542-2770
- Enumerated
- Jul 31, 2006
- Record last updated
- Mar 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (909) 394-1800
- Medicare enrollment
- Enrolled (PECOS I20040401000827); accepts Medicare assignment
- Medical or professional school
- Irvine California College Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 1335 W Cypress Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Baker, D.P.T., O.C.S.Physical Therapist1750382925
- Claudio Gallego, M.D.Nephrology Physician1285649962
- Mojtaba Moghadam, M.D.Nephrology Physician1932114733
- Christopher Patterson, D.P.T.Physical Therapist1619059714
Verify Michael Hien Bien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74264Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average nephrology physician in 2024
3,909 Medicare Part D claims for 295 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Amlodipine Besylate252 claims
- Hydralazine Hcl242 claims
- Furosemide220 claims
- Prosol173 claims
- Losartan Potassium170 claims
- Sevelamer Hcl129 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $504.30
15 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- California Kidney SpecialistsOntario, CA
- Cua And Gan Medical CorporationWest Covina, CA
- Cua, Gan And Bien Medical CorporationWest Covina, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Hien Bien among 1,468 nephrology physician records in California
Michael Hien Bien, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2004 · median 2001 among the 1,128 with a school on file
- Record last updated2012 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 nephrology physician records list a practice address in San Dimas
They are 10 of the 942 NPPES records with a practice address in San Dimas, and 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in San Dimas → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Nitin Bhasin, M.D.San Dimas, CA 917731669790838
- Claudio Gallego, M.D.San Dimas, CA 917731285649962
- Aamir Jamal, M.D.San Dimas, CA 917731558377523
- Mojtaba Moghadam, M.D.San Dimas, CA 917731932114733
- Jim Nguyen, D.O.San Dimas, CA 917731417338898
- Amna Rizvi, M.D.San Dimas, CA 917731841483609
- Abid Rizvi, M.D.San Dimas, CA 917731255582540
- Shahid Syed, M.D.San Dimas, CA 917731174910848
Common questions
What is Michael Hien Bien, M.D.'s NPI number?
Michael Hien Bien, M.D.'s National Provider Identifier (NPI) is 1689680654, issued on Jul 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Hien Bien, M.D. located?
The NPPES record lists a practice address at 1335 W Cypress Ave, San Dimas, CA, 91773. Phone: (909) 542-2770. Providers update this record themselves, so call before visiting.
How can I verify Michael Hien Bien, M.D.'s license?
NPPES lists California license number A74264, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael Hien Bien, M.D. prescribe under Medicare Part D?
In 2024, Michael Hien Bien, M.D. had 3,909 Medicare Part D claims for 295 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.