Gwynneth Horner
Obstetrics & Gynecology Physician · Los Angeles, CA
Gwynneth Horner is an obstetrics & gynecology physician with a practice address in Los Angeles, California, and NPI 1568996510, issued on Apr 17, 2017. Check the license (California A179788, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gwynneth Horner
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A179788 CA
Self-reported in NPPES; status is on the state search - Practice location
- Ucla Ob/gyn 10833 LE Conte Ave Chs 27-126, Los Angeles, CA 90095
- Phone
- (310) 825-9945
- Enumerated
- Apr 17, 2017
- Record last updated
- Mar 13, 2024
- Medicare enrollment
- Enrolled (PECOS I20230321002203); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 2018
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Gwynneth Horner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A179788Check 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 obstetrics & gynecology physician in 2024
55 Medicare Part D claims for 31 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol19 claims
- Clobetasol Propionate12 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwynneth Horner among 5,088 obstetrics & gynecology physician records in California
Gwynneth Horner 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 2017, is newer than 87% of them.
- NPI issued2017 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2018 · 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 Los Angeles → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Gayane Ambartsumyan, MDLos Angeles, CA 900951174556849
- Tamara Grisales, M.D.Los Angeles, CA 900951063611762
- Andy Huang, M.D.Los Angeles, CA 900951134244924
- Michael Johnson, MDLos Angeles, CA 900951619048659
- Cheri Lowre, MDLos Angeles, CA 900951215967948
- Michael Lu, MDLos Angeles, CA 900951316972219
- Lauren Nathan, MDLos Angeles, CA 900951235164039
- Lisa Nicholas, MDLos Angeles, CA 900951750380648
Common questions
What is Gwynneth Horner's NPI number?
Gwynneth Horner's National Provider Identifier (NPI) is 1568996510, issued on Apr 17, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Gwynneth Horner located?
The NPPES record lists a practice address at Ucla Ob/gyn 10833 LE Conte Ave Chs 27-126, Los Angeles, CA, 90095. Phone: (310) 825-9945. Providers update this record themselves, so call before visiting.
How can I verify Gwynneth Horner's license?
NPPES lists California license number A179788, 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 Gwynneth Horner prescribe under Medicare Part D?
In 2024, Gwynneth Horner had 55 Medicare Part D claims for 31 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.