Sara Frances Okabayashi-Williams, FNP
Family Nurse Practitioner · Daly City, CA
Sara Frances Okabayashi-Williams, FNP is a family nurse practitioner with a practice address in Daly City, California, and NPI 1427169762, issued on Aug 31, 2006. Check the license (California 20390, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sara Frances Okabayashi-Williams
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 20390 CA
F334934-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 380 90TH St, Daly City, CA 94015
- Phone
- (650) 301-8406
- Enumerated
- Aug 31, 2006
- Record last updated
- Jul 10, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (650) 301-8626
- Medicare enrollment
- Enrolled (PECOS I20080410000253); 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 380 90TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kay Gamo, MDFamily Medicine Physician1245300771
- David Gershan, M.D.Family Medicine Physician1922182393
- Sheng Hsu, N.P.Adult Health Nurse Practitioner1316225873
Verify Sara Frances Okabayashi-Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 20390Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% more Medicare Part D claims than the average family nurse practitioner in 2024
2,133 Medicare Part D claims for 204 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium166 claims
- Losartan Potassium122 claims
- Amlodipine Besylate102 claims
- Metformin Hcl98 claims
- Lisinopril75 claims
- Levothyroxine Sodium68 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
- County OF San MateoSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara Frances Okabayashi-Williams among 16,966 family nurse practitioner records in California
Sara Frances Okabayashi-Williams, FNP 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 93% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2006 · median 2019 among the 6,793 with a school on file
- Record last updated2012 · 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).
29 family nurse practitioner records list a practice address in Daly City
They are 29 of the 1,606 NPPES records with a practice address in Daly City, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Daly City → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Elsa Agasid, F.N.P.Daly City, CA 940151962592360
- Zerina Bangawan, FNPDaly City, CA 940151508163213
- Fidel Cadag, NP - CDaly City, CA 940151023434016
- Lorraine Canaya, NPDaly City, CA 940151831279470
- Esther Chan, NPDaly City, CA 940151851579197
- Amanda Collison, FNP-CDaly City, CA 940151205186228
- Jose Robert Gaticales, APNDaly City, CA 940151982948295
- Therese Grenchik, FNPDaly City, CA 940151679608442
Common questions
What is Sara Frances Okabayashi-Williams, FNP's NPI number?
Sara Frances Okabayashi-Williams, FNP's National Provider Identifier (NPI) is 1427169762, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sara Frances Okabayashi-Williams, FNP located?
The NPPES record lists a practice address at 380 90TH St, Daly City, CA, 94015. Phone: (650) 301-8406. Providers update this record themselves, so call before visiting.
How can I verify Sara Frances Okabayashi-Williams, FNP's license?
NPPES lists California license number 20390, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Sara Frances Okabayashi-Williams, FNP prescribe under Medicare Part D?
In 2024, Sara Frances Okabayashi-Williams, FNP had 2,133 Medicare Part D claims for 204 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.