NPPES file of Aug 9, 2026

Dat Q. Duong, M.D.

Geriatric Medicine (Internal Medicine) Physician · Westminster, CA

Dat Q. Duong, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Westminster, California, and NPI 1689740912, issued on Nov 28, 2006. Check the license (California A77545, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1689740912
Name
Dat Q. Duong
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
A77545 CA
Self-reported in NPPES; status is on the state search
Practice location
13926 Beach Blvd, Westminster, CA 92683
Phone
(714) 893-1212
Enumerated
Nov 28, 2006
Record last updated
Dec 31, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(714) 893-1211
Medicaid ID
GR0089680 CA
Medicare enrollment
Enrolled (PECOS I20080516000219); may accept Medicare assignment
Medical or professional school
University Of California, Davis School Of Medicine, 2000
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 532 in California → Look up another NPI →

Verify Dat Q. 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 A77545    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

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4.3 times the Medicare Part D claims of the average geriatric medicine (internal medicine) physician in 2024

18,344 Medicare Part D claims for 714 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 96 claims were for opioids.

  1. Dat Duong18,344
  2. Specialty average4,246

Most prescribed

  1. Pravastatin Sodium1,140 claims
  2. Atorvastatin Calcium845 claims
  3. Losartan Potassium836 claims
  4. Metoprolol Succinate786 claims
  5. Valsartan657 claims
  6. Jardiance609 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: $3,501.63

57 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 1,004 providers of this specialty with any payment received $1,720.82 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Dat Duong$3,501.63
  2. Specialty average$1,720.82

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

  1. Family Choice Aco IncWestminster, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Dat Q. Duong among 532 geriatric medicine (internal medicine) physician records in California

Dat Q. Duong, M.D. is one of 532 geriatric medicine (internal medicine) physician records with a practice address in California. 77% 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 7% of them.

  • NPI issued2006 · 7% of these records are older, 46% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 51% of these records are
  • Graduated2000 · median 1999 among the 271 with a school on file
  • Record last updated2020 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in California

There are 532 geriatric medicine (internal medicine) physician records in California.

All 532 in California → Every provider in Westminster → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Christopher Nguyen, MDMission Viejo, CA 926911588624100
  2. Victor Siew, M.D.Fountain Valley, CA 927081164515003
  3. Richard Wong, M.D.Fountain Valley, CA 927081659416436
  4. Robert Feldman, M.D.Laguna Hills, CA 926531194805416
  5. Patricia Gifford, MDLaguna Hills, CA 926531487725552
  6. Suhail Hawit, MDLaguna Hills, CA 926531538229224
  7. Sarah Teymoorian, M.D.Laguna Hills, CA 926531518147396
  8. John Homan, MDHuntington Beach, CA 926461437116142

Common questions

What is Dat Q. Duong, M.D.'s NPI number?

Dat Q. Duong, M.D.'s National Provider Identifier (NPI) is 1689740912, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Dat Q. Duong, M.D. located?

The NPPES record lists a practice address at 13926 Beach Blvd, Westminster, CA, 92683. Phone: (714) 893-1212. Providers update this record themselves, so call before visiting.

How can I verify Dat Q. Duong, M.D.'s license?

NPPES lists California license number A77545, 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 Dat Q. Duong, M.D. prescribe under Medicare Part D?

In 2024, Dat Q. Duong, M.D. had 18,344 Medicare Part D claims for 714 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

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.