Phuong Nguyen, DO
Internal Medicine Physician · Sierra Madre, CA
Phuong Nguyen, DO is an internal medicine physician with a practice address in Sierra Madre, California, and NPI 1336609908, issued on Mar 20, 2019. Check the license (California 20A19418, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Phuong Nguyen
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A19418 CA
Self-reported in NPPES; status is on the state search - Practice location
- 147 W Sierra Madre Blvd, Sierra Madre, CA 91024
- Phone
- (626) 355-3443
- Enumerated
- Mar 20, 2019
- Record last updated
- Feb 2, 2023
- Fax
- (626) 355-7843
- Medicare enrollment
- Enrolled (PECOS I20220906002462); accepts Medicare assignment
- Medical or professional school
- Touro Un Col Of Osteopathic Medicine, Henderson, 2019
- 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 147 W Sierra Madre Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denise Aldahl, MDObstetrics & Gynecology Physician1174746804
- Jossalyn Emslie, M.D.Family Medicine Physician1013913508
- Lorraine Gray, R.D.Registered Dietitian1881035913
- Florizza ReyesFamily Nurse Practitioner1235803545
- Hani Sami, MDInternal Medicine Physician1306891957
- Nathalie Sami, MDInternal Medicine Physician1902487622
Verify Phuong Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A19418Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,445 Medicare Part D claims for 187 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Atorvastatin Calcium116 claims
- Levothyroxine Sodium92 claims
- Amlodipine Besylate65 claims
- Rosuvastatin Calcium53 claims
- Tamsulosin Hcl50 claims
- Losartan Potassium46 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: $427.72
18 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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
- Sierra Madre Community Medical Group IncSierra Madre, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Phuong Nguyen among 17,696 internal medicine physician records in California
Phuong Nguyen, DO 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
7 internal medicine physician records list a practice address in Sierra Madre
They are 7 of the 178 NPPES records with a practice address in Sierra Madre, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sierra Madre → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Liviu Chindris, M.DSierra Madre, CA 910241730156472
- Linda Crawford, DOSierra Madre, CA 910241841360427
- John Herziger, MDSierra Madre, CA 910241518097914
- Leena Sahay, MDSierra Madre, CA 910241356387005
- Hani Sami, MDSierra Madre, CA 910241306891957
- Nathalie Sami, MDSierra Madre, CA 910241902487622
- Jan Yuo, M.D., M.P.H.Montrose, CA 910201528096716
- Christopher Jong, M.D.South Pasadena, CA 910301336336700
Common questions
What is Phuong Nguyen, DO's NPI number?
Phuong Nguyen, DO's National Provider Identifier (NPI) is 1336609908, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Phuong Nguyen, DO located?
The NPPES record lists a practice address at 147 W Sierra Madre Blvd, Sierra Madre, CA, 91024. Phone: (626) 355-3443. Providers update this record themselves, so call before visiting.
How can I verify Phuong Nguyen, DO's license?
NPPES lists California license number 20A19418, 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 Phuong Nguyen, DO prescribe under Medicare Part D?
In 2024, Phuong Nguyen, DO had 1,445 Medicare Part D claims for 187 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.