William J. Zepf, MD
Family Medicine Physician · Davis, CA
William J. Zepf, MD is a family medicine physician with a practice address in Davis, California, and NPI 1063512069, issued on Sep 22, 2006. Check the license (California G72554, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William J. Zepf
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G72554 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2030 Sutter PL, Davis, CA 95616
- Phone
- (530) 750-5800
- Enumerated
- Sep 22, 2006
- Record last updated
- Jun 12, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (530) 750-5804
- Medicaid ID
- 00G725540 CA
- Medicare enrollment
- Enrolled (PECOS I20081106000664); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1990
- 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 2030 Sutter PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William J. Zepf in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G72554Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% more Medicare Part D claims than the average family medicine physician in 2024
4,477 Medicare Part D claims for 285 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 305 claims were for opioids.
Most prescribed
- Valsartan214 claims
- Hydrochlorothiazide207 claims
- Atorvastatin Calcium178 claims
- Hydrocodone-Acetaminophen135 claims
- Gabapentin133 claims
- Spironolactone123 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
- Sutter Valley Medical FoundationSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William J. Zepf among 17,133 family medicine physician records in California
William J. Zepf, MD 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1990 · median 2005 among the 10,652 with a school on file
- Record last updated2015 · 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).
96 family medicine physician records list a practice address in Davis
They are 96 of the 1,711 NPPES records with a practice address in Davis, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Davis → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Lisa Baumeister, MDDavis, CA 956161952354805
- John Chuck, M.D.Davis, CA 956161164408704
- Rebecca Darsey, MDDavis, CA 956161447240916
- Wetona Eidson-Ton, M.D.Davis, CA 956161609851674
- Sarah Jones, MDDavis, CA 956161306882030
- Melissa Marshall, M.D.Davis, CA 956161477526291
- Karen Mo, M.D.Davis, CA 956161326023086
- Thomas Ormiston, MDDavis, CA 956161568498319
Common questions
What is William J. Zepf, MD's NPI number?
William J. Zepf, MD's National Provider Identifier (NPI) is 1063512069, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Zepf, MD located?
The NPPES record lists a practice address at 2030 Sutter PL, Davis, CA, 95616. Phone: (530) 750-5800. Providers update this record themselves, so call before visiting.
How can I verify William J. Zepf, MD's license?
NPPES lists California license number G72554, 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 William J. Zepf, MD prescribe under Medicare Part D?
In 2024, William J. Zepf, MD had 4,477 Medicare Part D claims for 285 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.