John W. Birsner, MD
Obstetrics & Gynecology Physician · Lancaster, CA
John W. Birsner, MD is an obstetrics & gynecology physician with a practice address in Lancaster, California, and NPI 1457443525, issued on Sep 28, 2006. Check the license (California C37218, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John W. Birsner
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- C37218 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 W Avenue J, Lancaster, CA 93534
- Phone
- (661) 943-4236
- Enumerated
- Sep 28, 2006
- Record last updated
- Apr 4, 2022
- Medicaid ID
- 00C372180 CA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1600 W Avenue J
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sam Abid, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1295366656
- Hazem Aboaid, MDInternal Medicine Physician1689323552
- Beverly Kim AgniPsychiatric/Mental Health Registered Nurse1194542761
- Josephine Aideloje, NPPsychiatric/Mental Health Nurse Practitioner1790272243
- Imaobong AliyuAdult Psychiatric/Mental Health Registered Nurse1497343206
- Sam Allen, MDObstetrics & Gynecology Physician1982740841
Verify John W. Birsner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C37218Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
24 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
John W. Birsner among 5,088 obstetrics & gynecology physician records in California
John W. Birsner, 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 updated2022 · 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 Lancaster → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Sam Allen, MDLancaster, CA 935341982740841
- Herminia Amezcua, MDLancaster, CA 935341326282385
- Katrina Baker, MDLancaster, CA 935341538154836
- Oluwamuyiwa Bolonduro, M.DLancaster, CA 935341215216965
- Suzanne Chaudhry, M.D.Lancaster, CA 935341730223066
- Alex Danso, MDLancaster, CA 935341972611655
- Jackson Fu, MDLancaster, CA 935341871581637
- Kaitlin Hoff, M.D.Lancaster, CA 935341841665650
Common questions
What is John W. Birsner, MD's NPI number?
John W. Birsner, MD's National Provider Identifier (NPI) is 1457443525, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John W. Birsner, MD located?
The NPPES record lists a practice address at 1600 W Avenue J, Lancaster, CA, 93534. Phone: (661) 943-4236. Providers update this record themselves, so call before visiting.
How can I verify John W. Birsner, MD's license?
NPPES lists California license number C37218, 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 John W. Birsner, MD prescribe under Medicare Part D?
In 2024, John W. Birsner, MD had 24 Medicare Part D claims; 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.