William Silas Nichols, NP
Family Nurse Practitioner · San Francisco, CA
William Silas Nichols, NP is a family nurse practitioner with a practice address in San Francisco, California, and NPI 1326664145, issued on Jun 17, 2020. Check the license (California NP95017184, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Silas Nichols
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- NP95017184 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2238 Geary Blvd, San Francisco, CA 94115
- Phone
- (415) 833-2200
- Enumerated
- Jun 17, 2020
- Record last updated
- Mar 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20220901003363); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 2238 Geary Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Silas Nichols in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP95017184Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average family nurse practitioner in 2024
94 Medicare Part D claims for 64 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
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
- Carbon Health Medical Group OF California PCSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Silas Nichols among 16,966 family nurse practitioner records in California
William Silas Nichols, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 56% of them.
- NPI issued2020 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2020 · median 2019 among the 6,793 with a school on file
- Record last updated2022 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
662 family nurse practitioner records list a practice address in San Francisco
They are 662 of the 38,143 NPPES records with a practice address in San Francisco, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in San Francisco → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Catherine Grace Alejo, NPSan Francisco, CA 941151932273521
- Jill Baker, MSN, FNPSan Francisco, CA 941151477628881
- Cheri Barzottini, MSN, FNPSan Francisco, CA 941151336219443
- Sherry Couto, NPSan Francisco, CA 941151477586451
- Marianne Lakamp, FNPSan Francisco, CA 941151679646277
- Mideo Luk, NPSan Francisco, CA 941151275630188
- Evelyn Martinez, NPSan Francisco, CA 941151760410591
- Lisa Mihaly, RN, FNPSan Francisco, CA 941151770508186
Common questions
What is William Silas Nichols, NP's NPI number?
William Silas Nichols, NP's National Provider Identifier (NPI) is 1326664145, issued on Jun 17, 2020. An NPI identifies a provider in billing; it is not a license.
Where is William Silas Nichols, NP located?
The NPPES record lists a practice address at 2238 Geary Blvd, San Francisco, CA, 94115. Phone: (415) 833-2200. Providers update this record themselves, so call before visiting.
How can I verify William Silas Nichols, NP's license?
NPPES lists California license number NP95017184, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Silas Nichols, NP prescribe under Medicare Part D?
In 2024, William Silas Nichols, NP had 94 Medicare Part D claims for 64 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.