William Quan, D.D.S.
General Practice Dentistry · El Centro, CA
William Quan, D.D.S. is a general practice dentistry with a practice address in El Centro, California, and NPI 1942410030, issued on May 23, 2007. Check the license (California 21190, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Quan
- Credential
- D.D.S.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 21190 CA
Self-reported in NPPES; status is on the state search - Practice location
- 480 W Olive Ave Ste 5, El Centro, CA 92243
- Phone
- (760) 352-7011
- Enumerated
- May 23, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (760) 352-7012
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Verify William Quan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 21190Check 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 general practice dentistry in 2024
37 Medicare Part D claims for 27 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin26 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.
William Quan among 17,852 general practice dentistry records in California
William Quan, D.D.S. is one of 17,852 general practice dentistry records with a practice address in California. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 29% of them.
- NPI issued2007 · 29% of these records are older, 40% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Dentistry providers in California
There are 17,852 general practice dentistry records in California.
All 17,852 in California → Every provider in El Centro → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Javad Aghaloo, D.D.S.El Centro, CA 922431073708582
- Antonio Estrada, DDSEl Centro, CA 922431306631288
- Angelica Juarez HernandezEl Centro, CA 922431053876094
- Randal Miles, D.D.S.El Centro, CA 922431285789875
- Eddie Siman, DDSEl Centro, CA 922431437102928
- Steven Buechler, DDSDesert Hot Springs, CA 922401053464057
- Juana Cavinder, DDSDesert Hot Springs, CA 922401093915605
- Harry Hart, DDSDesert Hot Springs, CA 922401598812802
Common questions
What is William Quan, D.D.S.'s NPI number?
William Quan, D.D.S.'s National Provider Identifier (NPI) is 1942410030, issued on May 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Quan, D.D.S. located?
The NPPES record lists a practice address at 480 W Olive Ave Ste 5, El Centro, CA, 92243. Phone: (760) 352-7011. Providers update this record themselves, so call before visiting.
How can I verify William Quan, D.D.S.'s license?
NPPES lists California license number 21190, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Quan, D.D.S. prescribe under Medicare Part D?
In 2024, William Quan, D.D.S. had 37 Medicare Part D claims for 27 beneficiaries; the average among general practice dentistry prescribers was 83. 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.