Meryl Leff, LCSW, CASAC, BCD
NPI 1689767592 · Addiction (Substance Use Disorder) Counselor · Babylon, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Meryl Leff, LCSW, CASAC, BCD is a Addiction (Substance Use Disorder) Counselor provider in Babylon, NY (NPI 1689767592).
Provider details
- NPI number
- 1689767592
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LCSW, CASAC, BCD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 10712 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 yrs in NPPES 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
- 2006-10-02
- Last updated
- 2025-09-11
Frequently asked questions
- What is Meryl Leff's NPI number?
- Meryl Leff's National Provider Identifier (NPI) is 1689767592, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Meryl Leff's specialty?
- Meryl Leff is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Meryl Leff located?
- Meryl Leff's practice location on file with NPPES is 400 W Main St, Babylon, NY 11702-3012.
- What is Meryl Leff's phone number?
- The practice phone number listed in the NPPES registry for Meryl Leff is (631) 893-6355.
- Does Meryl Leff accept Medicare?
- Meryl Leff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Meryl Leff's NPI active?
- Yes — Meryl Leff's NPI (1689767592) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.