Mark Shay, D.D.S.
Dentist · Orange, CA
Mark Shay, D.D.S. is a dentist with a practice address in Orange, California, and NPI 1811104524, issued on May 16, 2007. Check the license (California 55655, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Shay
- Credential
- D.D.S.
- Primary taxonomy
- Dentist 122300000X
- License number
- 55655 CA
Self-reported in NPPES; status is on the state search - Practice location
- 648 N Tustin St, Orange, CA 92867
- Phone
- (714) 771-0190
- Enumerated
- May 16, 2007
- Record last updated
- Mar 31, 2011 (not updated in 15 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 →
Also registered at 648 N Tustin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abbas Etemadi, DMDGeneral Practice Dentistry1619120797
Verify Mark Shay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 55655Check 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. Brand-name drugs were 0% of claims.
Most prescribed
- Chlorhexidine Gluconate13 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.
Mark Shay among 14,729 dentist records in California
Mark Shay, D.D.S. 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 2007, is newer than 18% of them.
- NPI issued2007 · 18% of these records are older, 58% 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 updated2011 · 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).
147 dentist records list a practice address in Orange
They are 147 of the 13,245 NPPES records with a practice address in Orange, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Orange → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Maria Concepcion Balagtas, DDSOrange, CA 928671689734816
- Gene Campana, DDSOrange, CA 928671467503854
- Tsongi Chai, D.D.S.Orange, CA 928671881744860
- Frank Denunzio, D.D.S.Orange, CA 928671336359793
- Gary Garoian, D.D.S.Orange, CA 928671265522577
- Renu Michelsen, DDSOrange, CA 928671952451346
- Trung Nguyen, DDSOrange, CA 928671831318054
- Kris RobinsonOrange, CA 928671689841504
Common questions
What is Mark Shay, D.D.S.'s NPI number?
Mark Shay, D.D.S.'s National Provider Identifier (NPI) is 1811104524, issued on May 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Shay, D.D.S. located?
The NPPES record lists a practice address at 648 N Tustin St, Orange, CA, 92867. Phone: (714) 771-0190. Providers update this record themselves, so call before visiting.
How can I verify Mark Shay, D.D.S.'s license?
NPPES lists California license number 55655, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Shay, D.D.S. prescribe under Medicare Part D?
In 2024, Mark Shay, D.D.S. 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.