NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John M Griffin

Clinical Social Worker in Boston, MA · enumerated 2012 · practices at Hope House Inc..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1972853901

Verified

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Registry record

Entity type Individual (Type 1)
Name John M Griffin
Sex Male
Practice address Boston, MA, 02119
Phone (617) 971-9370
Enumeration date Sep 18, 2012
Last updated in NPPES Sep 18, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 216634 (MA) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1972853901 active?
Yes, as of the latest NPPES snapshot, NPI 1972853901 is active (record last updated 2012-09-18).
How do I verify John Griffin's NPI record?
Cross-check NPI 1972853901 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-18.