John L. Clothier, M.D.
Family Medicine Physician · San Rafael, CA
John L. Clothier, M.D. is a family medicine physician with a practice address in San Rafael, California, and NPI 1750431250, issued on Jan 10, 2007. Check the license (California G81579, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John L. Clothier
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G81579 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4000 Civic Center Dr Ste 206, San Rafael, CA 94903
- Phone
- (415) 925-8865
- Enumerated
- Jan 10, 2007
- Record last updated
- Mar 17, 2026
- Fax
- (415) 446-0134
- Medicare enrollment
- Enrolled (PECOS I20090423000065); may accept Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4000 Civic Center Dr Ste 206
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wilson Wang, MDPediatrics Physician1073608543
Verify John L. Clothier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G81579Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average family medicine physician in 2024
409 Medicare Part D claims for 271 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Cephalexin36 claims
- Prednisone31 claims
- Nitrofurantoin Mono-Macro27 claims
- Fluticasone Propionate23 claims
- Mupirocin18 claims
- Amoxicillin-Clavulanate Potass16 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
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John L. Clothier among 17,133 family medicine physician records in California
John L. Clothier, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1993 · median 2005 among the 10,652 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
37 family medicine physician records list a practice address in San Rafael
They are 37 of the 3,159 NPPES records with a practice address in San Rafael, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Rafael → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Charles Calza, M.D.San Rafael, CA 949031629081161
- Marissa Fernandez Kiemele, MDSan Rafael, CA 949031144297516
- Orna Hananel, MDSan Rafael, CA 949031497839484
- Ann Hathaway, MDSan Rafael, CA 949031093893752
- Brian Hertz, MDSan Rafael, CA 949031831273812
- Meenal Lohtia, M.D.San Rafael, CA 949031205883121
- Sarah Mansell, MDSan Rafael, CA 949031548332364
- Drew MarisSan Rafael, CA 949031467538397
Common questions
What is John L. Clothier, M.D.'s NPI number?
John L. Clothier, M.D.'s National Provider Identifier (NPI) is 1750431250, issued on Jan 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John L. Clothier, M.D. located?
The NPPES record lists a practice address at 4000 Civic Center Dr Ste 206, San Rafael, CA, 94903. Phone: (415) 925-8865. Providers update this record themselves, so call before visiting.
How can I verify John L. Clothier, M.D.'s license?
NPPES lists California license number G81579, 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 L. Clothier, M.D. prescribe under Medicare Part D?
In 2024, John L. Clothier, M.D. had 409 Medicare Part D claims for 271 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.