Jill M. Mason, MD
Obstetrics & Gynecology Physician · Clovis, CA
Jill M. Mason, MD is an obstetrics & gynecology physician with a practice address in Clovis, California, and NPI 1033297841, issued on Nov 1, 2006. Check the license (California C51600, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jill M. Mason
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- C51600 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2071 Herndon Ave, Clovis, CA 93611
- Phone
- (559) 324-5100
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00C516000 CA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 2071 Herndon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kelly Ayala, MDObstetrics & Gynecology Physician1134421704
- Jennifer Bague, LCSWClinical Social Worker1407035108
- Diana BlumbergPharmacist1275064339
- Rhobe Brager, DOPediatrics Physician1780147694
Verify Jill M. Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C51600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
329 Medicare Part D claims for 112 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Estradiol99 claims
- Yuvafem66 claims
- Clobetasol Propionate27 claims
- Nystatin-Triamcinolone23 claims
- Medroxyprogesterone Acetate18 claims
- Oxybutynin Chloride Er12 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.
Jill M. Mason among 5,088 obstetrics & gynecology physician records in California
Jill M. Mason, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2021 · 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 Clovis → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Zhiyuh Chang, MDClovis, CA 936111134207046
- Dan Dorough, MDClovis, CA 936111417011289
- David Dorough, MDClovis, CA 936111144384918
- Roderick Harris, MDClovis, CA 936111780646018
- Asawari Khadye, MDClovis, CA 936111427122746
- Seung Nam Kim, M.D.Clovis, CA 936111134112154
- Lorenzo Lopez, MDClovis, CA 936111578566246
- Gilbert Moran, M.D.Clovis, CA 936111891873709
Common questions
What is Jill M. Mason, MD's NPI number?
Jill M. Mason, MD's National Provider Identifier (NPI) is 1033297841, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jill M. Mason, MD located?
The NPPES record lists a practice address at 2071 Herndon Ave, Clovis, CA, 93611. Phone: (559) 324-5100. Providers update this record themselves, so call before visiting.
How can I verify Jill M. Mason, MD's license?
NPPES lists California license number C51600, 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 Jill M. Mason, MD prescribe under Medicare Part D?
In 2024, Jill M. Mason, MD had 329 Medicare Part D claims for 112 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.