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

Mrs. Gretchen Hazen Powers, LICSW

Clinical Social Worker in Holliston, MA · enumerated 2006.

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

National Provider Identifier

1952470379

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Registry record

Entity type Individual (Type 1)

Name Mrs. Gretchen Hazen Powers

Credential LICSW

Sex Female

Practice address Holliston, MA, 01746

Phone (508) 207-5495

Fax (508) 429-6353

Enumeration date Nov 7, 2006

Last updated in NPPES Jul 9, 2007

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 110137 (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 1952470379 active?

Yes, as of the latest NPPES snapshot, NPI 1952470379 is active (record last updated 2007-07-09).

How do I verify Gretchen Powers's NPI record?

Cross-check NPI 1952470379 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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Kevin Zwetchkenbaum Addiction (Substance Use Disorder) Counselor · Holliston, MA NPI 1538144746 Lisa Wood Nutrition Chiropractor · Holliston, MA NPI 1699894147 Neurosync Medical Group (Nj), P.C. Neurology Physician · Holliston, MA NPI 1598547960 Neurosync Medical Group (Il), S.C. Neurology Physician · Holliston, MA NPI 1972378974

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.