Alisa L Williams, MD, Facog, Inc.
NPI 1083887921 · Specialist · San Diego, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alisa L Williams, MD, Facog, Inc. is a Specialist organization in San Diego, CA (NPI 1083887921).
Provider details
- NPI number
- 1083887921
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Alisa Williams, Officer(619) 299-3111
- License
- G60944 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
- 2008-04-11
- Last updated
- 2020-01-02
- Certified
- 2020-01-02
Frequently asked questions
- What is Alisa L Williams, MD, Facog, Inc.'s NPI number?
- Alisa L Williams, MD, Facog, Inc.'s National Provider Identifier (NPI) is 1083887921, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Alisa L Williams, MD, Facog, Inc.?
- Alisa L Williams, MD, Facog, Inc. is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Alisa L Williams, MD, Facog, Inc. located?
- Alisa L Williams, MD, Facog, Inc.'s practice location on file with NPPES is 5555 Reservoir Dr Ste 307, San Diego, CA 92120-5134.
- What is Alisa L Williams, MD, Facog, Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Alisa L Williams, MD, Facog, Inc. is (619) 299-3111.
- Does Alisa L Williams, MD, Facog, Inc. accept Medicare?
- Alisa L Williams, MD, Facog, Inc. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Alisa L Williams, MD, Facog, Inc.?
- The authorized official listed on Alisa L Williams, MD, Facog, Inc.'s NPPES record is Alisa Williams, Officer. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Alisa L Williams, MD, Facog, Inc.'s NPI active?
- Yes — Alisa L Williams, MD, Facog, Inc.'s NPI (1083887921) is active in the NPPES registry as of the last update on 2020-01-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.