Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Hallock, M.A.

Mental Health Counselor in Hadley, MA · enumerated 2016.

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

National Provider Identifier

1861940751

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Registry record

Entity type Individual (Type 1)

Name John Hallock

Credential M.A.

Sex Male

Practice address 95 Mount Warner Rd, Hadley, MA, 01035

Phone (314) 549-8874

Enumeration date Sep 20, 2016

Last updated in NPPES Apr 3, 2019

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 10913 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1861940751 active?

Yes, as of the latest NPPES snapshot, NPI 1861940751 is active (record last updated 2019-04-03).

How do I verify John Hallock's NPI record?

Cross-check NPI 1861940751 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-03.