Steve Nguyen, D.O.
Gastroenterology Physician · Rosemead, CA
Steve Nguyen, D.O. is a gastroenterology physician with a practice address in Rosemead, California, and NPI 1649357732, issued on Nov 1, 2006. Check the license (California 20A7028, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steve Nguyen
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 20A7028 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9120 Valley Blvd, Rosemead, CA 91770
- Phone
- (626) 316-8169
- Enumerated
- Nov 1, 2006
- Record last updated
- Aug 26, 2025
- Medicaid ID
- 00AX70281 CA
- Medicare enrollment
- Enrolled (PECOS I20050315001170); may accept Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1995
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 9120 Valley Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelly Nguyen, DPTPhysical Therapist1558055897
Verify Steve Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7028Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average gastroenterology physician in 2024
410 Medicare Part D claims for 190 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Entecavir98 claims
- Gavilyte-G66 claims
- Sod Sulf-Potass Sulf-Mag Sulf66 claims
- Famotidine36 claims
- Sucralfate22 claims
- Peg-3350 And Electrolytes19 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.
Steve Nguyen among 2,140 gastroenterology physician records in California
Steve Nguyen, D.O. is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1995 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Rosemead → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Tu Tranvan, M.D.Rosemead, CA 917701376570184
- Andrew Dam, DOPomona, CA 917671225590037
- Gerald Goldman, MDPomona, CA 917671538232905
- Kenneth Lee, MDPomona, CA 917671417023227
- Krishan Malhotra, M.D.Pomona, CA 917671497831978
- Jason Shin, M. D.Pomona, CA 917671316926678
- Sung Yoo, MDDiamond Bar, CA 917651437141587
- Robert Mehler, M.D.San Gabriel, CA 917761730259243
Common questions
What is Steve Nguyen, D.O.'s NPI number?
Steve Nguyen, D.O.'s National Provider Identifier (NPI) is 1649357732, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steve Nguyen, D.O. located?
The NPPES record lists a practice address at 9120 Valley Blvd, Rosemead, CA, 91770. Phone: (626) 316-8169. Providers update this record themselves, so call before visiting.
How can I verify Steve Nguyen, D.O.'s license?
NPPES lists California license number 20A7028, 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 Steve Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Steve Nguyen, D.O. had 410 Medicare Part D claims for 190 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.