Harry Nguyen, D.O.
Hepatology Physician · Orange, CA
Harry Nguyen, D.O. is a hepatology physician with a practice address in Orange, California, and NPI 1003277930, issued on Mar 20, 2016. Check the license (California 20A21145, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harry Nguyen
- Credential
- D.O.
- Primary taxonomy
- Hepatology Physician 207RI0008X
- License number
- 20A21145 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 456-7002
- Enumerated
- Mar 20, 2016
- Record last updated
- Jan 23, 2025
- Medicare enrollment
- Enrolled (PECOS I20230724003242); accepts Medicare assignment
- Medical or professional school
- Nova Southeastern College Of Osteo Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Harry Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A21145Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average hepatology physician in 2024
447 Medicare Part D claims for 119 beneficiaries, against an average of 762 among the 228 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Vemlidy151 claims
- Sod Sulf-Potass Sulf-Mag Sulf39 claims
- Furosemide37 claims
- Xifaxan30 claims
- Entecavir27 claims
- Spironolactone27 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hepatology Physician providers in California
There are 43 hepatology physician records in California.
Other hepatology physician records in California
- Walid Ayoub, M.D.West Hollywood, CA1073524211
- Harjot Bath, MDFresno, CA1699394627
- Maurizio Bonacini, M.D.San Francisco, CA1114944972
- Allen Cooper, M.D.Stanford, CA1477624609
- Adam Deising, D.O.La Jolla, CA1235285222
- Albert Do, MD, MPHSacramento, CA1942575154
- Deepti Dronamraju, MDPalo Alto, CA1265692180
- Mohamed El Kabany, MDLos Angeles, CA1316004757
- Karl Esrason, MDLos Angeles, CA1982763553
- Gabriel Garcia, M.D.Palo Alto, CA1144378597
Common questions
What is Harry Nguyen, D.O.'s NPI number?
Harry Nguyen, D.O.'s National Provider Identifier (NPI) is 1003277930, issued on Mar 20, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Harry Nguyen, D.O. located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 456-7002. Providers update this record themselves, so call before visiting.
How can I verify Harry Nguyen, D.O.'s license?
NPPES lists California license number 20A21145, 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 Harry Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Harry Nguyen, D.O. had 447 Medicare Part D claims for 119 beneficiaries; the average among hepatology physician prescribers was 762. Part D covers Medicare prescriptions only.
What is Harry Nguyen, D.O.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.