William Blake Falk, MSN, APRN, BC
Family Nurse Practitioner · San Francisco, CA
William Blake Falk, MSN, APRN, BC is a family nurse practitioner with a practice address in San Francisco, California, and NPI 1609942861, issued on Nov 28, 2006. Check the license (California 14427, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Blake Falk
- Credential
- MSN, APRN, BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 14427 CA
Self-reported in NPPES; status is on the state search - Practice location
- 46 Cragmont Ave, San Francisco, CA 94116
- Phone
- (415) 823-5131
- Enumerated
- Nov 28, 2006
- Record last updated
- Sep 25, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- NP0144270 CA
- Medicare enrollment
- Enrolled (PECOS I20040609000631); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Verify William Blake Falk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 14427Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average family nurse practitioner in 2024
598 Medicare Part D claims for 93 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.
Most prescribed
- Donepezil Hcl120 claims
- Escitalopram Oxalate83 claims
- Mirtazapine61 claims
- Quetiapine Fumarate51 claims
- Trazodone Hcl29 claims
- Nuedexta23 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.
The MIPS final score for 2023 (Medicare payment program): 41.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
William Blake Falk among 16,966 family nurse practitioner records in California
William Blake Falk, MSN, APRN, BC 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
- Graduated2003 · 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).
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
- Ashley Babcock, RN, NP STUDENTSan Francisco, CA 941161083277875
- Ivonne CastellanosSan Francisco, CA 941161467210104
- Sarah Dellatorre, MSN, NP-CSan Francisco, CA 941161306329669
- Nkechinyere EsemaSan Francisco, CA 941161275291346
- Gabriela Gonzalez, NPSan Francisco, CA 941161073222576
- Diana Huang, N.P.San Francisco, CA 941161528609427
- Fiona LeeSan Francisco, CA 941161205248036
- Igor Mocorro, DNP, MPH, FNP-BCSan Francisco, CA 941161780283143
Common questions
What is William Blake Falk, MSN, APRN, BC's NPI number?
William Blake Falk, MSN, APRN, BC's National Provider Identifier (NPI) is 1609942861, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Blake Falk, MSN, APRN, BC located?
The NPPES record lists a practice address at 46 Cragmont Ave, San Francisco, CA, 94116. Phone: (415) 823-5131. Providers update this record themselves, so call before visiting.
How can I verify William Blake Falk, MSN, APRN, BC's license?
NPPES lists California license number 14427, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Blake Falk, MSN, APRN, BC prescribe under Medicare Part D?
In 2024, William Blake Falk, MSN, APRN, BC had 598 Medicare Part D claims for 93 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
What is William Blake Falk, MSN, APRN, BC's MIPS final score?
The 2023 MIPS final score is 41.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.