NPPES file of Aug 9, 2026

John T. Duong, M.D.

Internal Medicine Physician · Long Beach, CA

John T. Duong, M.D. is an internal medicine physician with a practice address in Long Beach, California, and NPI 1356364889, issued on Jul 25, 2006. Check the license (California A66685, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1356364889
Name
John T. Duong
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A66685 CA
Self-reported in NPPES; status is on the state search
Practice location
4540 E 7TH St, Long Beach, CA 90804
Phone
(562) 344-1150
Enumerated
Jul 25, 2006
Record last updated
Jan 18, 2026
Fax
(562) 344-1155
Medicaid ID
00A666850 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 4540 E 7TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Joan Anderson, FAMILY NPFamily Nurse Practitioner1164731071
  2. Vanessa Aveiro, PA-CMedical Physician Assistant1982698916
  3. Naziya Charaniya, NP-CFamily Nurse Practitioner1124455365
  4. Jimmy Diep, M.D.Internal Medicine Physician1912944216
  5. Caroline Frushour, N.P.Gerontology Nurse Practitioner1548616956
  6. Nansi Ann Sibal, NURSE PRACTITIONERFamily Nurse Practitioner1184986440

Verify John T. Duong in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A66685    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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John T. Duong among 17,696 internal medicine physician records in California

John T. Duong, 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 not. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

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

  1. Jimmy Diep, M.D.Long Beach, CA 908041912944216
  2. Ronaldo Roque, M.D.Long Beach, CA 908041932397189
  3. Siamak Rouzroch, MDLong Beach, CA 908041730271685
  4. Michael Tehrani, M.D.Long Beach, CA 908041427320704
  5. Priyanka Gogte, MDLakewood, CA 908051518453422
  6. Sayeed Khan, M.D.Long Beach, CA 908051497757512
  7. Alexandria Lee, M.D.Long Beach, CA 908031598128183
  8. Ronald Tejada, MDLakewood, CA 908051407165079

Common questions

What is John T. Duong, M.D.'s NPI number?

John T. Duong, M.D.'s National Provider Identifier (NPI) is 1356364889, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.

Where is John T. Duong, M.D. located?

The NPPES record lists a practice address at 4540 E 7TH St, Long Beach, CA, 90804. Phone: (562) 344-1150. Providers update this record themselves, so call before visiting.

How can I verify John T. Duong, M.D.'s license?

NPPES lists California license number A66685, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.