IndividualActive
Michael Willis, RN
NPI 1598620023 · Registered Nurse · San Francisco, CA
Michael Willis, RN is a Registered Nurse provider in San Francisco, CA (NPI 1598620023).
Provider details
- NPI number
- 1598620023
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Male
- Sole proprietor
- Yes
- License
- 95426724 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Established profile(53/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
890 Hayes St
San Francisco, CA 94117-2615
Phone: (415) 762-3700
Street-level locationGet directions
Mailing address
1990 Green St Apt 104
San Francisco, CA 94123-4846
Registry dates
- Enumerated
- 2025-12-17
- Last updated
- 2025-12-17
- Certified
- 2025-12-17
Frequently asked questions
- What is Michael Willis's NPI number?
- Michael Willis's National Provider Identifier (NPI) is 1598620023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Willis's specialty?
- Michael Willis is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Michael Willis located?
- Michael Willis's practice location on file with NPPES is 890 Hayes St, San Francisco, CA 94117-2615.
- What is Michael Willis's phone number?
- The practice phone number listed in the NPPES registry for Michael Willis is (415) 762-3700.
- Is Michael Willis's NPI active?
- Yes — Michael Willis's NPI (1598620023) is active in the NPPES registry as of the last update on 2025-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.