John Birsner, MD
NPI 1457443525 · Obstetrics & Gynecology Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Birsner, MD is a Obstetrics & Gynecology Physician provider in Lancaster, CA (NPI 1457443525).
Provider details
- NPI number
- 1457443525
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- C37218 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-28
- Last updated
- 2022-04-04
- Certified
- 2022-03-20
Frequently asked questions
- What is John Birsner's NPI number?
- John Birsner's National Provider Identifier (NPI) is 1457443525, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Birsner's specialty?
- John Birsner is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is John Birsner located?
- John Birsner's practice location on file with NPPES is 1600 W Avenue J, Lancaster, CA 93534-2814.
- What is John Birsner's phone number?
- The practice phone number listed in the NPPES registry for John Birsner is (661) 943-4236.
- Does John Birsner accept Medicare?
- John Birsner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Birsner's NPI active?
- Yes — John Birsner's NPI (1457443525) is active in the NPPES registry as of the last update on 2022-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.