Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Joan Postlethwaite Longcope, LICSW

Clinical Social Worker in Rockland, MA · enumerated 2007 · practices at Arbour Elder Services, Inc..

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

National Provider Identifier

1598989337

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Registry record

Entity type Individual (Type 1)

Name Ms. Joan Postlethwaite Longcope

Credential LICSW

Sex Female

Practice address 100 Ledgewood Pl, Suite 202, Rockland, MA, 02370

Phone (781) 871-6550

Enumeration date Apr 12, 2007

Last updated in NPPES Feb 16, 2010

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 100978 (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 1598989337 active?

Yes, as of the latest NPPES snapshot, NPI 1598989337 is active (record last updated 2010-02-16).

How do I verify Joan Longcope's NPI record?

Cross-check NPI 1598989337 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 2010-02-16.