James Leathem, LCSW
NPI 1649387150 · Clinical Social Worker · Boston, MA
James Leathem, LCSW is a Clinical Social Worker provider in Boston, MA (NPI 1649387150).
Provider details
- NPI number
- 1649387150
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 069832-1 (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
2 documented practice locations
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
Additional practice locations (1)
- 555 Highland AveCheshire, CT 06410-2255Phone: (475) 224-3033
Registry dates
- Enumerated
- 2006-08-23
- Last updated
- 2023-03-07
- Certified
- 2023-03-07
Frequently asked questions
- What is James Leathem's NPI number?
- James Leathem's National Provider Identifier (NPI) is 1649387150, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Leathem's specialty?
- James Leathem is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is James Leathem located?
- James Leathem's practice location on file with NPPES is 150 S Huntington Ave, Boston, MA 02130-4817.
- What is James Leathem's phone number?
- The practice phone number listed in the NPPES registry for James Leathem is (203) 638-8590.
- Is James Leathem's NPI active?
- Yes — James Leathem's NPI (1649387150) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.