Loan Nguyen, MD
Internal Medicine Physician · Mission Viejo, CA
Loan Nguyen, MD is an internal medicine physician with a practice address in Mission Viejo, California, and NPI 1346477858, issued on Jun 11, 2009. Check the license (California A106830, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Loan Nguyen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A106830 CA
Self-reported in NPPES; status is on the state search - Practice location
- 26800 Crown Valley Pkwy, Mission Viejo, CA 92691
- Phone
- (949) 364-6000
- Enumerated
- Jun 11, 2009
- Entity
- Type 1 · individual
Also registered at 26800 Crown Valley Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Soodabeh Abravesh, M.D.Obstetrics & Gynecology Physician1376785865
- Matt Ahmadi, D.P.M.Foot & Ankle Surgery Podiatrist1285635144
- Jennifer Altamira, ACNPAcute Care Nurse Practitioner1205815248
- Habib Azad, M.D.Nephrology Physician1114962610
- Bahman Badie, M.D.Internal Medicine Physician1396721916
- Mehrnaz Badie, M.D.Internal Medicine Physician1831212885
Verify Loan Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A106830Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
448 Medicare Part D claims for 182 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 29 claims were for opioids.
Most prescribed
- Levofloxacin29 claims
- Amoxicillin-Clavulanate Potass26 claims
- Amlodipine Besylate20 claims
- Pantoprazole Sodium20 claims
- Eliquis15 claims
- Hydrocodone-Acetaminophen14 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: $472.87
20 payments, mostly food and beverage; the largest payer was Abbvie Inc.. The 65,274 providers of this specialty with any payment received $2,536.66 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.
One hospital or facility affiliation
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
73 internal medicine physician records list a Mission Viejo practice address
They are 73 of the 2,156 NPPES records with a Mission Viejo practice address, and 20,403 internal medicine physician records in California.
All 73 in Mission Viejo → All 20,403 in California → Every provider in Mission Viejo →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Loan Nguyen, MD's NPI number?
Loan Nguyen, MD's National Provider Identifier (NPI) is 1346477858, issued on Jun 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Loan Nguyen, MD located?
The NPPES record lists a practice address at 26800 Crown Valley Pkwy, Mission Viejo, CA, 92691. Phone: (949) 364-6000. Providers update this record themselves, so call before visiting.
How can I verify Loan Nguyen, MD's license?
NPPES lists California license number A106830, 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 Loan Nguyen, MD prescribe under Medicare Part D?
In 2024, Loan Nguyen, MD had 448 Medicare Part D claims for 182 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.