Gillian Austin Dorner, M.D.
General Practice Physician · Ventura, CA
Gillian Austin Dorner, M.D. is a general practice physician with a practice address in Ventura, California, and NPI 1508082157, issued on Apr 18, 2007. Check the license (California A95216, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gillian Austin Dorner
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- A95216 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3291 Loma Vista RD, Ventura, CA 93003
- Phone
- (805) 652-6000
- Enumerated
- Apr 18, 2007
- Record last updated
- Jul 10, 2023
- Medicare enrollment
- Enrolled (PECOS I20090625000187); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 3291 Loma Vista RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gillian Austin Dorner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A95216Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average general practice physician in 2024
404 Medicare Part D claims for 24 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Levothyroxine Sodium26 claims
- Atorvastatin Calcium23 claims
- Hydrocodone-Acetaminophen21 claims
- Metformin Hcl17 claims
- Amlodipine Besylate15 claims
- Omeprazole14 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): 87.2 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
- County OF VenturaVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gillian Austin Dorner among 1,956 general practice physician records in California
Gillian Austin Dorner, M.D. is one of 1,956 general practice physician records with a practice address in California. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 50% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileYes · 27% of these records are
- Graduated2004 · median 1994 among the 520 with a school on file
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in California
There are 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Ventura → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Nicolas Limthong, M.D.Ventura, CA 930031750726758
- Nobel Nguyen, DOVentura, CA 930031306467444
- David Surace, DOVentura, CA 930031548780026
- Hung Do, MDCamarillo, CA 930101659673382
- Mark Bettermon, M.D. D.O.Camarillo, CA 930121417367079
- John Zemjanis, M.D.Carpinteria, CA 930131093898272
- Katrina Fernandes, FNPMoorpark, CA 930211366026999
- Marc Judd, M.D.Moorpark, CA 930211124025218
Common questions
What is Gillian Austin Dorner, M.D.'s NPI number?
Gillian Austin Dorner, M.D.'s National Provider Identifier (NPI) is 1508082157, issued on Apr 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gillian Austin Dorner, M.D. located?
The NPPES record lists a practice address at 3291 Loma Vista RD, Ventura, CA, 93003. Phone: (805) 652-6000. Providers update this record themselves, so call before visiting.
How can I verify Gillian Austin Dorner, M.D.'s license?
NPPES lists California license number A95216, 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 Gillian Austin Dorner, M.D. prescribe under Medicare Part D?
In 2024, Gillian Austin Dorner, M.D. had 404 Medicare Part D claims for 24 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
What is Gillian Austin Dorner, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.2 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.