Toquynh Dinh Kieu, M.D.
Pediatrics Physician · Fountain Valley, CA
Toquynh Dinh Kieu, M.D. is a pediatrics physician with a practice address in Fountain Valley, California, and NPI 1093895674, issued on Oct 17, 2006. Check the license (California A31746, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Toquynh Dinh Kieu
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A31746 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11100 Warner Ave, Fountain Valley, CA 92708
- Phone
- (714) 641-0850
- Enumerated
- Oct 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (714) 434-6158
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 11100 Warner Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Toquynh Dinh Kieu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A31746Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average pediatrics physician in 2024
30 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
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: $287.62
5 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 21,580 providers of this specialty with any payment received $842.05 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.
Toquynh Dinh Kieu among 9,272 pediatrics physician records in California
Toquynh Dinh Kieu, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% 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, 56% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2007 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 pediatrics physician records list a practice address in Fountain Valley
They are 37 of the 2,190 NPPES records with a practice address in Fountain Valley, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Fountain Valley → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Valery Brouwer, MDFountain Valley, CA 927081508895228
- Bradford Curtis, MDFountain Valley, CA 927081932190568
- Lori Debold, M.D.Fountain Valley, CA 927081831194323
- Bertram Dias, MDFountain Valley, CA 927081780613406
- Julie Fallon, MDFountain Valley, CA 927081891785234
- Richard Grainey, MDFountain Valley, CA 927081174570782
- Myduyen Nguyen, MDFountain Valley, CA 927081316939481
- Michael Ozaki, MDFountain Valley, CA 927081619958527
Common questions
What is Toquynh Dinh Kieu, M.D.'s NPI number?
Toquynh Dinh Kieu, M.D.'s National Provider Identifier (NPI) is 1093895674, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Toquynh Dinh Kieu, M.D. located?
The NPPES record lists a practice address at 11100 Warner Ave, Fountain Valley, CA, 92708. Phone: (714) 641-0850. Providers update this record themselves, so call before visiting.
How can I verify Toquynh Dinh Kieu, M.D.'s license?
NPPES lists California license number A31746, 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 Toquynh Dinh Kieu, M.D. prescribe under Medicare Part D?
In 2024, Toquynh Dinh Kieu, M.D. had 30 Medicare Part D claims; the average among pediatrics physician prescribers was 375. 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.