Kien-An Duong, MD
Internal Medicine Physician · Laguna Woods, CA
Kien-An Duong, MD is an internal medicine physician with a practice address in Laguna Woods, California, and NPI 1033175658, issued on Apr 22, 2006. Check the license (California A94108, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kien-An Duong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A94108 CA
236804 NY
Self-reported in NPPES; status is on the state search - Practice location
- 24268 EL Toro Road, Laguna Woods, CA 92637
- Phone
- (657) 241-8455
- Enumerated
- Apr 22, 2006
- Record last updated
- Jan 31, 2025
- Fax
- (657) 295-2116
- Medicaid ID
- 00A941080 CA
- Medicare enrollment
- Enrolled (PECOS I20060810000594); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 24268 EL Toro Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Dangvu, M.D.Family Medicine Physician1063453330
- James Lee, M.D.Internal Medicine Physician1891853107
- Talar Moy, FNPFamily Nurse Practitioner1811695349
Verify Kien-An Duong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94108Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average internal medicine physician in 2024
9,119 Medicare Part D claims for 568 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 122 claims were for opioids.
Most prescribed
- Atorvastatin Calcium832 claims
- Losartan Potassium545 claims
- Amlodipine Besylate354 claims
- Tamsulosin Hcl339 claims
- Metformin Hcl337 claims
- Lisinopril235 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
- Memorialcare Medical FoundationLaguna Woods, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kien-An Duong among 17,696 internal medicine physician records in California
Kien-An Duong, MD 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
- Graduated2001 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
3 internal medicine physician records list a practice address in Laguna Woods
They are 3 of the 185 NPPES records with a practice address in Laguna Woods, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Laguna Woods → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Susan Grenz, MDLaguna Woods, CA 926371013989870
- James Lee, M.D.Laguna Woods, CA 926371891853107
- Tracy Siegfried, M.D.Laguna Hills, CA 926371366598591
- Sahar Lashin, M.D.Lake Forest, CA 926301598053894
- Madineth Muy, M.D.Lake Forest, CA 926301992807721
- Suma Oommen, M.D.Lake Forest, CA 926301063431203
- Nicole Sandler, NPLake Forest, CA 926301346933165
- Usha Idnani, M.D.Dana Point, CA 926291861446056
Common questions
What is Kien-An Duong, MD's NPI number?
Kien-An Duong, MD's National Provider Identifier (NPI) is 1033175658, issued on Apr 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kien-An Duong, MD located?
The NPPES record lists a practice address at 24268 EL Toro Road, Laguna Woods, CA, 92637. Phone: (657) 241-8455. Providers update this record themselves, so call before visiting.
How can I verify Kien-An Duong, MD's license?
NPPES lists California license number A94108, 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 Kien-An Duong, MD prescribe under Medicare Part D?
In 2024, Kien-An Duong, MD had 9,119 Medicare Part D claims for 568 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.