NPPES file of Aug 9, 2026

Nancy Thien Vu, M.D.

Neurology Physician · Fountain Valley, CA

Nancy Thien Vu, M.D. is a neurology physician with a practice address in Fountain Valley, California, and NPI 1821059957, issued on Mar 29, 2006. Check the license (California G50663, 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
1821059957
Name
Nancy Thien Vu
Credential
M.D.
Primary taxonomy
Neurology Physician 2084N0400X
License number
G50663 CA
Self-reported in NPPES; status is on the state search
Practice location
17100 Euclid St, Fountain Valley, CA 92708
Phone
(714) 891-5453
Enumerated
Mar 29, 2006
Record last updated
May 1, 2025
Fax
(714) 891-5346
Medicaid ID
00G506631 CA
Medicare enrollment
Enrolled (PECOS I20040628000900); accepts Medicare assignment
Medical or professional school
State University Of New York At Buffalo School Of Medicine, 1981
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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Also registered at 17100 Euclid St

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

  1. Manoochehr Abadian Sharifabad, M.D.Pulmonary Disease Physician1164655817
  2. Keith Aceron, DPMFoot & Ankle Surgery Podiatrist1801236740
  3. Janelle Agustin, PHARMDPharmacist1033880364
  4. Sara Ajifu - Tully, LCSWClinical Social Worker1124528104
  5. Lori Akasaka, LCSWClinical Social Worker1881197879
  6. Linda Araki, R.D.Registered Dietitian1184802373

Verify Nancy Thien Vu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G50663
    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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3.6 times the Medicare Part D claims of the average neurology physician in 2024

4,986 Medicare Part D claims for 408 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 348 claims were for opioids.

  1. Nancy Vu4,986
  2. Specialty average1,370

Most prescribed

  1. Memantine Hcl323 claims
  2. Gabapentin302 claims
  3. Levetiracetam298 claims
  4. Donepezil Hcl276 claims
  5. Carbidopa-Levodopa184 claims
  6. Divalproex Sodium149 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: $3,934.88

126 payments; by number, the most common kind was food and beverage; the largest payer was Ucb, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Nancy Vu$3,934.88
  2. Specialty average$8,318.07

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Nancy Thien Vu among 2,339 neurology physician records in California

Nancy Thien Vu, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.

  • NPI issued2006 · 4% of these records are older, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1981 · median 2006 among the 1,628 with a school on file
  • Record last updated2025 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurology Physician providers in California

There are 2,339 neurology physician records in California.

The 8 neurology physician records with the nearest ZIP codes

  1. Martin Backman, M.D.Santa Ana, CA 927081699738385
  2. Abdullah Ibish, MDFountain Valley, CA 927081154783397
  3. Tim Lai, M.D.Fountain Valley, CA 927081295094324
  4. Mehrdad Mahdad, M.D.Fountain Valley, CA 927081225092190
  5. Deepmala Nandanwar, M.D.Fountain Valley, CA 927081942685094
  6. Duke Phan, MDFountain Valley, CA 927081437352630
  7. Scott Shoemaker, MDFountain Valley, CA 927081881632784
  8. Daniel Truong, M.D.Fountain Valley, CA 927081992720916

Common questions

What is Nancy Thien Vu, M.D.'s NPI number?

Nancy Thien Vu, M.D.'s National Provider Identifier (NPI) is 1821059957, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Nancy Thien Vu, M.D. located?

The NPPES record lists a practice address at 17100 Euclid St, Fountain Valley, CA, 92708. Phone: (714) 891-5453. Providers update this record themselves, so call before visiting.

How can I verify Nancy Thien Vu, M.D.'s license?

NPPES lists California license number G50663, 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 Nancy Thien Vu, M.D. prescribe under Medicare Part D?

In 2024, Nancy Thien Vu, M.D. had 4,986 Medicare Part D claims for 408 beneficiaries; the average among neurology physician prescribers was 1,370. 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.