Rene Avans Der Gregorian, D.M.D.
Dentist · Pasadena, CA
Rene Avans Der Gregorian, D.M.D. is a dentist with a practice address in Pasadena, California, and NPI 1285612416, issued on Jan 6, 2006. Check the license (California 58165, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rene Avans Der Gregorian
- Credential
- D.M.D.
- Primary taxonomy
- Dentist 122300000X
- License number
- 58165 CA
Self-reported in NPPES; status is on the state search - Practice location
- 988 E Washington Blvd, Pasadena, CA 91104
- Phone
- (626) 296-6600
- Enumerated
- Jan 6, 2006
- Record last updated
- Feb 2, 2026
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Verify Rene Avans Der Gregorian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 58165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average dentist in 2024
28 Medicare Part D claims for 18 beneficiaries, 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
- Amoxicillin13 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.
Rene Avans Der Gregorian among 14,729 dentist records in California
Rene Avans Der Gregorian, D.M.D. 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 updated2026 · 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).
Dentist providers in California
There are 14,729 dentist records in California.
All 14,729 in California → Every provider in Pasadena → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Aram Arakelyan, D.D.SPasadena, CA 911041710036181
- Tigran Avdalyan, DDSPasadena, CA 911041396424222
- Christine Choi, D.D.S.Pasadena, CA 911041780612176
- Ki Hoh, DDSPasadena, CA 911041487752697
- Marc Horton, D.M.D.Pasadena, CA 911041881081974
- Niloufar Molayem, DDSPasadena, CA 911041356468235
- Ibrahim RabadiPasadena, CA 911041306904891
- Zena Saklawi, DDSPasadena, CA 911041316625676
Common questions
What is Rene Avans Der Gregorian, D.M.D.'s NPI number?
Rene Avans Der Gregorian, D.M.D.'s National Provider Identifier (NPI) is 1285612416, issued on Jan 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rene Avans Der Gregorian, D.M.D. located?
The NPPES record lists a practice address at 988 E Washington Blvd, Pasadena, CA, 91104. Phone: (626) 296-6600. Providers update this record themselves, so call before visiting.
How can I verify Rene Avans Der Gregorian, D.M.D.'s license?
NPPES lists California license number 58165, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Rene Avans Der Gregorian, D.M.D. prescribe under Medicare Part D?
In 2024, Rene Avans Der Gregorian, D.M.D. had 28 Medicare Part D claims for 18 beneficiaries; 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.