John Laster
NPI 1821795444 · Addiction (Substance Use Disorder) Counselor · Torrance, CA
John Laster is a Addiction (Substance Use Disorder) Counselor provider in Torrance, CA (NPI 1821795444).
Provider details
- NPI number
- 1821795444
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
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
3 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
Mailing address
Registry dates
- Enumerated
- 2023-02-14
- Last updated
- 2023-02-14
- Certified
- 2023-02-14
Frequently asked questions
- What is John Laster's NPI number?
- John Laster's National Provider Identifier (NPI) is 1821795444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Laster's specialty?
- John Laster is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Laster located?
- John Laster's practice location on file with NPPES is 3440 Torrance Blvd Ste 104, Torrance, CA 90503-5805.
- What is John Laster's phone number?
- The practice phone number listed in the NPPES registry for John Laster is (310) 787-1335.
- Is John Laster's NPI active?
- Yes — John Laster's NPI (1821795444) is active in the NPPES registry as of the last update on 2023-02-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.