Niem L. Nguyen, M.D.
Internal Medicine Physician · Anaheim, CA
Niem L. Nguyen, M.D. is an internal medicine physician with a practice address in Anaheim, California, and NPI 1669429957, issued on May 30, 2006. Check the license (California A78088, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Niem L. Nguyen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A78088 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1182 N Euclid St, Anaheim, CA 92801
- Phone
- (714) 399-9222
- Enumerated
- May 30, 2006
- Record last updated
- Jul 29, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (714) 399-9226
- Medicaid ID
- 00A780880 CA
- Medicare enrollment
- Enrolled (PECOS I20060511000388); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1182 N Euclid St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monique April, NPFamily Nurse Practitioner1093288730
- Steven Arabo, MDInternal Medicine Physician1144451410
- Minal Borsada, MDInternal Medicine Physician1457485500
- Hani El JammalInternal Medicine Physician1942523642
- Jennifer Gilbert, FNP-CFamily Nurse Practitioner1376817056
- Jeniffer Johnson, N.P.Nurse Practitioner1568651909
Verify Niem L. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78088Check 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
507 Medicare Part D claims for 164 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Ondansetron Odt78 claims
- Amoxicillin-Clavulanate Potass29 claims
- Metoprolol Tartrate28 claims
- Hydralazine Hcl20 claims
- Amlodipine Besylate19 claims
- Furosemide18 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: $298.10
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- Chest And Critical Care Consultants A Medical GroupTustin, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Niem L. Nguyen among 17,696 internal medicine physician records in California
Niem L. Nguyen, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1991 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
189 internal medicine physician records list a practice address in Anaheim
They are 189 of the 9,018 NPPES records with a practice address in Anaheim, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Anaheim → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amirtha Ajit, MDAnaheim, CA 928011881688422
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- Srikrishna Chundru, MDAnaheim, CA 928011932162815
- Kenneth Han, D.O.Anaheim, CA 928011811960982
- Hooshang Javaheri, MDAnaheim, CA 928011063419448
- Edwin Mattson, MDAnaheim, CA 928011770580920
- Min Min Mya, M.D.Anaheim, CA 928011154369148
- Parvin Nazari, MDAnaheim, CA 928011437148632
Common questions
What is Niem L. Nguyen, M.D.'s NPI number?
Niem L. Nguyen, M.D.'s National Provider Identifier (NPI) is 1669429957, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Niem L. Nguyen, M.D. located?
The NPPES record lists a practice address at 1182 N Euclid St, Anaheim, CA, 92801. Phone: (714) 399-9222. Providers update this record themselves, so call before visiting.
How can I verify Niem L. Nguyen, M.D.'s license?
NPPES lists California license number A78088, 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 Niem L. Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Niem L. Nguyen, M.D. had 507 Medicare Part D claims for 164 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.