Nhien Hao Nguyen, MD
Surgery Physician · San Marcos, CA
Nhien Hao Nguyen, MD is a surgery physician with a practice address in San Marcos, California, and NPI 1518144609, issued on Jan 30, 2008. Check the license (California A99217, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nhien Hao Nguyen
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A99217 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Craven RD FL 3, San Marcos, CA 92078
- Phone
- (619) 662-1222
- Enumerated
- Jan 30, 2008
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101101000130); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Nhien Hao Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99217Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% more Medicare Part D claims than the average surgery physician in 2024
148 Medicare Part D claims for 66 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 51 claims were for opioids.
Most prescribed
- Meloxicam50 claims
- Hydrocodone-Acetaminophen43 claims
- Ursodiol24 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nhien Hao Nguyen among 3,118 surgery physician records in California
Nhien Hao Nguyen, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 58% of them.
- NPI issued2008 · 58% of these records are older, 37% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2005 · median 2003 among the 1,901 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in San Marcos → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Camellia Racu-Keefer, MDSan Marcos, CA 920781801979299
- Jay Grove, M.D.Vista, CA 920811912971334
- Karen Hanna, M.D.Vista, CA 920811184687337
- Edward Robertson, MDVista, CA 920831861416000
- Stephen Wilson, MDVista, CA 920831902810914
- Matthew Kozloff, M.D.San Marcos, CA 920691801933288
- Joseph Capozzi, M.D.Rancho Santa Fe, CA 920671912201591
- Jennifer Winter, DNP, AGNPRancho Santa Fe, CA 920671154249621
Common questions
What is Nhien Hao Nguyen, MD's NPI number?
Nhien Hao Nguyen, MD's National Provider Identifier (NPI) is 1518144609, issued on Jan 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Nhien Hao Nguyen, MD located?
The NPPES record lists a practice address at 400 Craven RD FL 3, San Marcos, CA, 92078. Phone: (619) 662-1222. Providers update this record themselves, so call before visiting.
How can I verify Nhien Hao Nguyen, MD's license?
NPPES lists California license number A99217, 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 Nhien Hao Nguyen, MD prescribe under Medicare Part D?
In 2024, Nhien Hao Nguyen, MD had 148 Medicare Part D claims for 66 beneficiaries; the average among surgery physician prescribers was 147. 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.