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Greg Williamson
NPI 1902463359 · Behavior Analyst · Manhattan Beach, CA
Greg Williamson is a Behavior Analyst provider in Manhattan Beach, CA (NPI 1902463359).
Provider details
- NPI number
- 1902463359
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(60/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
83% 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
1230 Rosecrans Ave Ste 250
Manhattan Beach, CA 90266-2496
Phone: (310) 406-1500
Street-level locationGet directions
Mailing address
1020 E 2nd St Unit B
Long Beach, CA 90802-5504
Registry dates
- Enumerated
- 2019-05-21
- Last updated
- 2019-05-21
Frequently asked questions
- What is Greg Williamson's NPI number?
- Greg Williamson's National Provider Identifier (NPI) is 1902463359, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Williamson's specialty?
- Greg Williamson is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Greg Williamson located?
- Greg Williamson's practice location on file with NPPES is 1230 Rosecrans Ave Ste 250, Manhattan Beach, CA 90266-2496.
- What is Greg Williamson's phone number?
- The practice phone number listed in the NPPES registry for Greg Williamson is (310) 406-1500.
- Is Greg Williamson's NPI active?
- Yes — Greg Williamson's NPI (1902463359) is active in the NPPES registry as of the last update on 2019-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.