Gary Seiden
NPI 1518814730 · Addiction (Substance Use Disorder) Counselor · Santa Monica, CA
Gary Seiden is a Addiction (Substance Use Disorder) Counselor provider in Santa Monica, CA (NPI 1518814730).
Provider details
- NPI number
- 1518814730
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- C053660518 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
- 2026-03-16
- Last updated
- 2026-03-16
- Certified
- 2026-03-16
Frequently asked questions
- What is Gary Seiden's NPI number?
- Gary Seiden's National Provider Identifier (NPI) is 1518814730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Seiden's specialty?
- Gary Seiden is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Gary Seiden located?
- Gary Seiden's practice location on file with NPPES is 1002 Pico Blvd, Santa Monica, CA 90405-1416.
- What is Gary Seiden's phone number?
- The practice phone number listed in the NPPES registry for Gary Seiden is (310) 314-6200.
- Is Gary Seiden's NPI active?
- Yes — Gary Seiden's NPI (1518814730) is active in the NPPES registry as of the last update on 2026-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.