Laurence Leff, CADC II
NPI 1538359807 · Addiction (Substance Use Disorder) Counselor · Saint Helens, OR
Laurence Leff, CADC II is a Addiction (Substance Use Disorder) Counselor provider in Saint Helens, OR (NPI 1538359807).
Provider details
- NPI number
- 1538359807
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CADC II
- 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
18 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
- 2007-08-01
- Last updated
- 2007-08-01
Frequently asked questions
- What is Laurence Leff's NPI number?
- Laurence Leff's National Provider Identifier (NPI) is 1538359807, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Laurence Leff's specialty?
- Laurence Leff is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Laurence Leff located?
- Laurence Leff's practice location on file with NPPES is 185 N 4th St, Saint Helens, OR 97051-1535.
- What is Laurence Leff's phone number?
- The practice phone number listed in the NPPES registry for Laurence Leff is (503) 366-4526.
- Is Laurence Leff's NPI active?
- Yes — Laurence Leff's NPI (1538359807) is active in the NPPES registry as of the last update on 2007-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.