What is Jonathon Leiner's NPI number?

Jonathon Leiner's National Provider Identifier (NPI) is 1275421190, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Jonathon Leiner's specialty?

Jonathon Leiner is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).

Where is Jonathon Leiner located?

Jonathon Leiner's practice location on file with NPPES is 232 Putnam Ave, Cambridge, MA 02139-3767.

What is Jonathon Leiner's phone number?

The practice phone number listed in the NPPES registry for Jonathon Leiner is (240) 994-4813.

Is Jonathon Leiner's NPI active?

Yes — Jonathon Leiner's NPI (1275421190) is active in the NPPES registry as of the last update on 2025-06-27.

IndividualActive

Jonathon Leiner

NPI 1275421190 · Clinical Social Worker · Cambridge, MA

Jonathon Leiner is a Clinical Social Worker provider in Cambridge, MA (NPI 1275421190).

Provider details

NPI number: 1275421190
Entity type: Individual
Primary specialty: Clinical Social WorkerBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: LCSW228794 (MA)

Specialties & taxonomies

Clinical Social WorkerPrimary1041C0700XLicense LCSW228794 (MA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr 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

232 Putnam Ave

Cambridge, MA 02139-3767

Phone: (240) 994-4813

Street-level locationGet directions

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Mailing address