September Williams, MD
NPI 1013933886 · Internal Medicine Physician · San Francisco, CA
September Williams, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1013933886).
Provider details
- NPI number
- 1013933886
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G87161 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES 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
Mailing address
Registry dates
- Enumerated
- 2006-07-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is September Williams's NPI number?
- September Williams's National Provider Identifier (NPI) is 1013933886, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is September Williams's specialty?
- September Williams is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is September Williams located?
- September Williams's practice location on file with NPPES is 375 Laguna Honda Blvd, San Francisco, CA 94116-1411.
- What is September Williams's phone number?
- The practice phone number listed in the NPPES registry for September Williams is (415) 759-2357.
- Is September Williams's NPI active?
- Yes — September Williams's NPI (1013933886) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.