William Falk, MSN, APRN, BC
NPI 1609942861 · Family Nurse Practitioner · San Francisco, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Falk, MSN, APRN, BC is a Family Nurse Practitioner provider in San Francisco, CA (NPI 1609942861).
Provider details
- NPI number
- 1609942861
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, APRN, BC
- Sex
- Male
- Sole proprietor
- No
- License
- 14427 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,297 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 1,269 | $71 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 560 | $102 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 190 | $125 |
| Follow-Up Inpatient Consultation, Intermediate, Physicians Typically Spend 25 Minutes Communicating With the Patient Via TelehealthG0407 | 95 | $66 |
| Follow-Up Inpatient Consultation, Complex, Physicians Typically Spend 35 Minutes Communicating With the Patient Via TelehealthG0408 | 65 | $97 |
| Follow-Up Inpatient Consultation, Intermediate, Physicians Typically Spend 25 Minutes Communicating With the Patient Via Telehealth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Donepezil Hcl | 120 | 26 |
| Escitalopram Oxalate | 83 | 16 |
| Mirtazapine | 61 | 13 |
| Quetiapine Fumarate | 51 | — |
| Trazodone Hcl | 29 | — |
| Dextromethorphan Hbr/Quinidinebrand: Nuedexta | 23 | — |
| Paliperidonebrand: Paliperidone Er | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-28
- Last updated
- 2012-09-25
Frequently asked questions
- What is William Falk's NPI number?
- William Falk's National Provider Identifier (NPI) is 1609942861, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Falk's specialty?
- William Falk is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Falk located?
- William Falk's practice location on file with NPPES is 46 Cragmont Ave, San Francisco, CA 94116-1308.
- What is William Falk's phone number?
- The practice phone number listed in the NPPES registry for William Falk is (415) 823-5131.
- Does William Falk accept Medicare?
- William Falk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Falk's NPI active?
- Yes — William Falk's NPI (1609942861) is active in the NPPES registry as of the last update on 2012-09-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.