William A. Peters, MD
Nephrology Physician · San Jose, CA
William A. Peters, MD is a nephrology physician with a practice address in San Jose, California, and NPI 1861568347, issued on Nov 28, 2006. Check the license (California G43148, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William A. Peters
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- G43148 CA
Self-reported in NPPES; status is on the state search - Practice location
- 260 International Cir, San Jose, CA 95119
- Phone
- (408) 972-7000
- Enumerated
- Nov 28, 2006
- Record last updated
- Dec 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00G431480 CA
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 260 International Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William A. Peters in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G43148Check 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 nephrology physician in 2024
195 Medicare Part D claims for 110 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium18 claims
- Chlorthalidone14 claims
- Amlodipine Besylate12 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.
William A. Peters among 1,468 nephrology physician records in California
William A. Peters, MD is one of 1,468 nephrology physician records with a practice address in California. 88% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in San Jose → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Deepa Ramaswamy, MDSan Jose, CA 951191427134931
- Hubert Wang, MDSan Jose, CA 951191316574403
- Amarpreet Sandhu, D.O.San Jose, CA 951181912226002
- Maggie Chen, MDSan Jose, CA 951161649470683
- Jeongwon Choi, M.D.San Jose, CA 951161902213820
- Rashid Elahi, M.D.San Jose, CA 951161790753408
- Ning Fu, M.D.San Jose, CA 951161124224571
- Wen-Tsang Ku, M.D.San Jose, CA 951161710986161
Common questions
What is William A. Peters, MD's NPI number?
William A. Peters, MD's National Provider Identifier (NPI) is 1861568347, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William A. Peters, MD located?
The NPPES record lists a practice address at 260 International Cir, San Jose, CA, 95119. Phone: (408) 972-7000. Providers update this record themselves, so call before visiting.
How can I verify William A. Peters, MD's license?
NPPES lists California license number G43148, 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 A. Peters, MD prescribe under Medicare Part D?
In 2024, William A. Peters, MD had 195 Medicare Part D claims for 110 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.