John Hollister Thacher, M.D.
Dermatopathology Physician · Ojai, CA
John Hollister Thacher, M.D. is a dermatopathology physician with a practice address in Ojai, California, and NPI 1205962032, issued on Feb 26, 2007. Check the license (California G18881, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Hollister Thacher
- Credential
- M.D.
- Primary taxonomy
- Dermatopathology Physician 207ND0900X
- License number
- G18881 CA
Self-reported in NPPES; status is on the state search - Practice location
- 115 Pirie RD Ste F, Ojai, CA 93023
- Phone
- (805) 648-6969
- Enumerated
- Feb 26, 2007
- Record last updated
- Mar 6, 2025
- Fax
- (805) 648-3762
- Medicare enrollment
- Enrolled (PECOS I20100608000864); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1969
- Entity
- Type 1 · individual
8 nearest dermatopathology physician records → All 64 in California → Look up another NPI →
Verify John Hollister Thacher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G18881Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average dermatopathology physician in 2024
170 Medicare Part D claims for 93 beneficiaries, against an average of 693 among the 249 providers of this specialty who prescribed in Part D.
Most prescribed
- Imiquimod54 claims
- Valacyclovir17 claims
- Ketoconazole12 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 MIPS final score for 2023 (Medicare payment program): 8.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
John Hollister Thacher among 64 dermatopathology physician records in California
John Hollister Thacher, M.D. is one of 64 dermatopathology physician records with a practice address in California. 80% 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 63% of them.
- NPI issued2007 · 63% of these records are older, 28% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1969 · median 1995 among the 44 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ND0900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatopathology Physician providers in California
There are 64 dermatopathology physician records in California.
All 64 in California → Every provider in Ojai → Dermatopathology Physician nationwide →
The 8 dermatopathology physician records with the nearest ZIP codes
- William Brokken, M.D.Santa Barbara, CA 931051336140284
- Arnold Medved, M.D.Santa Barbara, CA 931051952413718
- Bonnie Lee, M.D.Orange, CA 928681417164492
- Stacy Whitelock, M.D.Fullerton, CA 928351497886048
- Behnam Abdollahi, MDAnaheim, CA 928071598836520
- Christopher Villard, M.D.Visalia, CA 932911376515742
- Lawrence Sherwin, M.D.Santa Ana, CA 927051508863150
- Mahsa Abdollahi, MDLaguna Hills, CA 926531043445554
Common questions
What is John Hollister Thacher, M.D.'s NPI number?
John Hollister Thacher, M.D.'s National Provider Identifier (NPI) is 1205962032, issued on Feb 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Hollister Thacher, M.D. located?
The NPPES record lists a practice address at 115 Pirie RD Ste F, Ojai, CA, 93023. Phone: (805) 648-6969. Providers update this record themselves, so call before visiting.
How can I verify John Hollister Thacher, M.D.'s license?
NPPES lists California license number G18881, 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 Hollister Thacher, M.D. prescribe under Medicare Part D?
In 2024, John Hollister Thacher, M.D. had 170 Medicare Part D claims for 93 beneficiaries; the average among dermatopathology physician prescribers was 693. Part D covers Medicare prescriptions only.
What is John Hollister Thacher, M.D.'s MIPS final score?
The 2023 MIPS final score is 8.9 of 100. 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.