Jan Nguyen, D.O.
Internal Medicine Physician · Long Beach, CA
Jan Nguyen, D.O. is an internal medicine physician with a practice address in Long Beach, California, and NPI 1477915452, issued on Mar 28, 2016. Check the license (California 20A17105, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jan Nguyen
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A17105 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2777 Pacific Ave Ste E, Long Beach, CA 90806
- Phone
- (562) 426-6571
- Enumerated
- Mar 28, 2016
- Record last updated
- Jan 26, 2026
- Medicare enrollment
- Enrolled (PECOS I20190816001383); accepts Medicare assignment
- Medical or professional school
- Western University Of Health Sciences College Of Dental Med, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Jan Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A17105Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average internal medicine physician in 2024
3,538 Medicare Part D claims for 332 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 25 claims were for opioids.
Most prescribed
- Atorvastatin Calcium207 claims
- Amlodipine Besylate163 claims
- Rosuvastatin Calcium138 claims
- Levothyroxine Sodium120 claims
- Gabapentin108 claims
- Famotidine103 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
- Healthcare Partners Affiliates Medical GroupLong Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jan Nguyen among 17,696 internal medicine physician records in California
Jan Nguyen, D.O. 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 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2016 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 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).
221 internal medicine physician records list a practice address in Long Beach
They are 221 of the 13,650 NPPES records with a practice address in Long Beach, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Long Beach → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- John Adams, D.O.Long Beach, CA 908061801852900
- Mark Asbill, M.D.Long Beach, CA 908061558310896
- Alla Gartsman, M.D.Long Beach, CA 908061457317133
- Sabrina Harper, MDLong Beach, CA 908061023081924
- Richard Im, MDLong Beach, CA 908061972586840
- Tina Kitajima, M.D.Long Beach, CA 908061033164892
- Angela Lamotte, M.D.Long Beach, CA 908061538166764
- Raymond Lee, M.D.Long Beach, CA 908061295790277
Common questions
What is Jan Nguyen, D.O.'s NPI number?
Jan Nguyen, D.O.'s National Provider Identifier (NPI) is 1477915452, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Jan Nguyen, D.O. located?
The NPPES record lists a practice address at 2777 Pacific Ave Ste E, Long Beach, CA, 90806. Phone: (562) 426-6571. Providers update this record themselves, so call before visiting.
How can I verify Jan Nguyen, D.O.'s license?
NPPES lists California license number 20A17105, 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 Jan Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Jan Nguyen, D.O. had 3,538 Medicare Part D claims for 332 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.