Sheila Phuong Nguyen, MD
Internal Medicine Physician · Fountain Valley, CA
Sheila Phuong Nguyen, MD is an internal medicine physician with a practice address in Fountain Valley, California, and NPI 1033435987, issued on Apr 18, 2010. Check the license (California C174484, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sheila Phuong Nguyen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C174484 CA
MD455531 PA
Self-reported in NPPES; status is on the state search - Practice location
- 17360 Brookhurst Street, Fountain Valley, CA 92708
- Phone
- (714) 665-1797
- Enumerated
- Apr 18, 2010
- Record last updated
- Dec 23, 2022
- Fax
- (714) 665-4680
- Medicare enrollment
- Enrolled (PECOS I20220524001263); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 17360 Brookhurst Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Cho, MDInternal Medicine Physician1275619983
- Constantinos Chrysostomou, MDPediatric Cardiology Physician1801868658
- Monica Hanna, D.O.Internal Medicine Physician1447870365
- Heather Hendron, RDRegistered Dietitian1770252470
- Nathan Kwong, MDInternal Medicine Physician1437654340
- Billy Le, D.O.Hospitalist Physician1255656963
Verify Sheila Phuong Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C174484Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
172 Medicare Part D claims for 80 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Furosemide11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $20.98
1 payment: food and beverage; the largest payer was Kestra Medical Technology Services, Inc. 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
- Memorialcare Medical FoundationCosta Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sheila Phuong Nguyen among 17,696 internal medicine physician records in California
Sheila Phuong Nguyen, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
83 internal medicine physician records list a practice address in Fountain Valley
They are 83 of the 2,190 NPPES records with a practice address in Fountain Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Fountain Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joel Bartlett, MDFountain Valley, CA 927081073518791
- Ihong Chen, MDFountain Valley, CA 927081104822535
- Naomi Cheung, MDFountain Valley, CA 927081073503314
- Alan Dang, M.D.Fountain Valley, CA 927081043217359
- Alton ForanFountain Valley, CA 927081619968799
- George Hong, MDFountain Valley, CA 927081154328532
- Brandon Khaw, MDFountain Valley, CA 927081568453637
- Lalita Komanapalli, MDFountain Valley, CA 927081578560884
Common questions
What is Sheila Phuong Nguyen, MD's NPI number?
Sheila Phuong Nguyen, MD's National Provider Identifier (NPI) is 1033435987, issued on Apr 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Sheila Phuong Nguyen, MD located?
The NPPES record lists a practice address at 17360 Brookhurst Street, Fountain Valley, CA, 92708. Phone: (714) 665-1797. Providers update this record themselves, so call before visiting.
How can I verify Sheila Phuong Nguyen, MD's license?
NPPES lists California license number C174484, 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 Sheila Phuong Nguyen, MD prescribe under Medicare Part D?
In 2024, Sheila Phuong Nguyen, MD had 172 Medicare Part D claims for 80 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Sheila Phuong Nguyen, MD's MIPS final score?
The 2023 MIPS final score is 76.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.