What is Gregory Williams's NPI number?

Gregory Williams's National Provider Identifier (NPI) is 1982495818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gregory Williams's specialty?

Gregory Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).

Where is Gregory Williams located?

Gregory Williams's practice location on file with NPPES is 1871 9th St, Santa Monica, CA 90404-4501.

What is Gregory Williams's phone number?

The practice phone number listed in the NPPES registry for Gregory Williams is (310) 314-6200.

Is Gregory Williams's NPI active?

Yes — Gregory Williams's NPI (1982495818) is active in the NPPES registry as of the last update on 2026-04-27.

IndividualActive

Gregory Williams

NPI 1982495818 · Addiction (Substance Use Disorder) Counselor · Santa Monica, CA

Gregory Williams is a Addiction (Substance Use Disorder) Counselor provider in Santa Monica, CA (NPI 1982495818).

Provider details

NPI number: 1982495818
Entity type: Individual
Primary specialty: Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: 225855 (CA)

Specialties & taxonomies

Addiction (Substance Use Disorder) CounselorPrimary101YA0400XLicense 225855 (CA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(59/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
2 documented practice locations

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

1871 9th St

Santa Monica, CA 90404-4501

Phone: (310) 314-6200

Street-level locationGet directions

More CA providers

Mailing address

8830 Moonbeam Ave

Panorama City, CA 91402-2622

Additional practice locations (1)

762 Griswold Ave
San Fernando, CA 91340-2105
Phone: (747) 500-9405

Enumerated: 2025-05-12
Last updated: 2026-04-27
Certified: 2026-04-27

Frequently asked questions

What is Gregory Williams's NPI number?: Gregory Williams's National Provider Identifier (NPI) is 1982495818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Gregory Williams's specialty?: Gregory Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
Where is Gregory Williams located?: Gregory Williams's practice location on file with NPPES is 1871 9th St, Santa Monica, CA 90404-4501.
What is Gregory Williams's phone number?: The practice phone number listed in the NPPES registry for Gregory Williams is (310) 314-6200.
Is Gregory Williams's NPI active?: Yes — Gregory Williams's NPI (1982495818) is active in the NPPES registry as of the last update on 2026-04-27.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.