Naim S. Kassar, M.D.
Obstetrics & Gynecology Physician · Glendora, CA
Naim S. Kassar, M.D. is an obstetrics & gynecology physician with a practice address in Glendora, California, and NPI 1417959628, issued on Jun 1, 2005. Check the license (California C41008, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Naim S. Kassar
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- C41008 CA
Self-reported in NPPES; status is on the state search - Practice location
- 315 E Route 66, Glendora, CA 91740
- Phone
- (626) 963-4124
- Enumerated
- Jun 1, 2005
- Record last updated
- Feb 1, 2024
- Fax
- (626) 963-6773
- Medicaid ID
- 00LC410080 CA
- Medicare enrollment
- Enrolled (PECOS I20050408001112); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 315 E Route 66
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steven Alvarez-Mott, M.D.Obstetrics & Gynecology Physician1659373850
- Emily Berry, M.D.Surgery Physician1700295425
- Najib Bouz, M.D.Obstetrics & Gynecology Physician1265434591
- Samuel Kassar, MDObstetrics & Gynecology Physician1205151032
- Ann Terai Escamillo, M.D.Obstetrics & Gynecology Physician1992799639
Verify Naim S. Kassar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C41008Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
425 Medicare Part D claims for 126 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol65 claims
- Estradiol (Twice Weekly)35 claims
- Alendronate Sodium34 claims
- Nystatin-Triamcinolone32 claims
- Clobetasol Propionate24 claims
- Dotti21 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Emanate Health Medical Care FoundationWest Covina, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Naim S. Kassar among 5,088 obstetrics & gynecology physician records in California
Naim S. Kassar, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1973 · median 2004 among the 2,700 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Glendora → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Steven Alvarez-Mott, M.D.Glendora, CA 917401659373850
- Najib Bouz, M.D.Glendora, CA 917401265434591
- Samuel Kassar, MDGlendora, CA 917401205151032
- Jeffrey Lee, M.D.Glendora, CA 917401891808481
- Ann Terai Escamillo, M.D.Glendora, CA 917401992799639
- Jacqueline Bracy, M.D.Glendora, CA 917411396806253
- Oriel NissimGlendora, CA 917411447606694
- Jorge Flores, M.D.Hacienda Heights, CA 917451710064415
Common questions
What is Naim S. Kassar, M.D.'s NPI number?
Naim S. Kassar, M.D.'s National Provider Identifier (NPI) is 1417959628, issued on Jun 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Naim S. Kassar, M.D. located?
The NPPES record lists a practice address at 315 E Route 66, Glendora, CA, 91740. Phone: (626) 963-4124. Providers update this record themselves, so call before visiting.
How can I verify Naim S. Kassar, M.D.'s license?
NPPES lists California license number C41008, 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 Naim S. Kassar, M.D. prescribe under Medicare Part D?
In 2024, Naim S. Kassar, M.D. had 425 Medicare Part D claims for 126 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Naim S. Kassar, M.D.'s MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.