Andrew S Williams M D
NPI 1568575959 · Ophthalmology Physician · San Francisco, CA
Andrew S Williams M D is a Ophthalmology Physician organization in San Francisco, CA (NPI 1568575959).
Provider details
- NPI number
- 1568575959
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Andrew Williams, Sole Proprietor(415) 431-9555
- License
- U80826 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Eye and Vision Services Providers
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
Other names (DBA / former)
- Other name
- A. Sydney Williams and Associates
Registry dates
- Enumerated
- 2006-08-17
- Last updated
- 2015-08-13
Frequently asked questions
- What is Andrew S Williams M D's NPI number?
- Andrew S Williams M D's National Provider Identifier (NPI) is 1568575959, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Andrew S Williams M D?
- Andrew S Williams M D is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew S Williams M D located?
- Andrew S Williams M D's practice location on file with NPPES is 45 Castro St Ste 318, San Francisco, CA 94114-1019.
- What is Andrew S Williams M D's phone number?
- The practice phone number listed in the NPPES registry for Andrew S Williams M D is (415) 431-9555.
- Who is the authorized official for Andrew S Williams M D?
- The authorized official listed on Andrew S Williams M D's NPPES record is Andrew Williams, Sole Proprietor. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Andrew S Williams M D's NPI active?
- Yes — Andrew S Williams M D's NPI (1568575959) is active in the NPPES registry as of the last update on 2015-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.