William J. Kapla, MD
Adult Medicine Physician · San Francisco, CA
William J. Kapla, MD is an adult medicine physician with a practice address in San Francisco, California, and NPI 1073545695, issued on Jul 6, 2006. Check the license (California C-32796, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William J. Kapla
- Credential
- MD
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- C-32796 CA
Self-reported in NPPES; status is on the state search - Practice location
- 45 Castro St, San Francisco, CA 94114
- Phone
- (415) 865-3737
- Enumerated
- Jul 6, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 865-3723
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 45 Castro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William J. Kapla in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C-32796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average adult medicine physician in 2024
59 Medicare Part D claims for 17 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of 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 J. Kapla among 386 adult medicine physician records in California
William J. Kapla, MD is one of 386 adult medicine physician records with a practice address in California. 69% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in San Francisco → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Jodi Baptiste, M.D.San Francisco, CA 941141508866153
- Charles Burns, MDSan Francisco, CA 941151588651582
- Ricardo Alvarez, MDSan Francisco, CA 941101649352626
- Mary Beasley, L.V.N.San Francisco, CA 941101346388642
- Richard Gibbs, MDSan Francisco, CA 941181760698211
- David Pepper, MDSan Francisco, CA 941101881776896
- Juan Posada, M.D.San Francisco, CA 941101265496301
- Joel Samuels, MDSan Francisco, CA 941101225314487
Common questions
What is William J. Kapla, MD's NPI number?
William J. Kapla, MD's National Provider Identifier (NPI) is 1073545695, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William J. Kapla, MD located?
The NPPES record lists a practice address at 45 Castro St, San Francisco, CA, 94114. Phone: (415) 865-3737. Providers update this record themselves, so call before visiting.
How can I verify William J. Kapla, MD's license?
NPPES lists California license number C-32796, 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. Kapla, MD prescribe under Medicare Part D?
In 2024, William J. Kapla, MD had 59 Medicare Part D claims for 17 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.