Quynh Giao Tonnu, DMD
Dentist · Hayward, CA
Quynh Giao Tonnu, DMD is a dentist with a practice address in Hayward, California, and NPI 1366454910, issued on Aug 12, 2006. Check the license (California 49420, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Quynh Giao Tonnu
- Credential
- DMD
- Primary taxonomy
- Dentist 122300000X
- License number
- 49420 CA
Self-reported in NPPES; status is on the state search - Practice location
- 713 A St, Hayward, CA 94541
- Phone
- (510) 537-1000
- Enumerated
- Aug 12, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Verify Quynh Giao Tonnu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 49420Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average dentist in 2024
19 Medicare Part D claims, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin14 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.
Quynh Giao Tonnu among 14,729 dentist records in California
Quynh Giao Tonnu, DMD is one of 14,729 dentist records with a practice address in California. 56% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 82% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
47 dentist records list a practice address in Hayward
They are 47 of the 3,993 NPPES records with a practice address in Hayward, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Hayward → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Rossana Cordero, DMDHayward, CA 945411164521779
- Andrew Dinh, D.D.S.Hayward, CA 945411508275025
- Brian Fong, D.D.S.Hayward, CA 945411801288071
- Doan-Trang Huynh, D.D.S.Hayward, CA 945411184939225
- Aouse Khalil, D.D.SHayward, CA 945411235415019
- Seungyoun Lyu, DDSHayward, CA 945411790170504
- Kenneth Meirovitz, DDSHayward, CA 945411669480646
- Khai Nguyen, DDSHayward, CA 945411215129424
Common questions
What is Quynh Giao Tonnu, DMD's NPI number?
Quynh Giao Tonnu, DMD's National Provider Identifier (NPI) is 1366454910, issued on Aug 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Quynh Giao Tonnu, DMD located?
The NPPES record lists a practice address at 713 A St, Hayward, CA, 94541. Phone: (510) 537-1000. Providers update this record themselves, so call before visiting.
How can I verify Quynh Giao Tonnu, DMD's license?
NPPES lists California license number 49420, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Quynh Giao Tonnu, DMD prescribe under Medicare Part D?
In 2024, Quynh Giao Tonnu, DMD had 19 Medicare Part D claims; the average among dentist prescribers was 86. 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.