Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Guillemin Counseling LLC

Q: What type of organization is Guillemin Counseling LLC?

Guillemin Counseling LLC is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).

Clinical Social Worker in Hanover, MA · enumerated 2019 · authorized official Julie Guillemin, Owner.

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

National Provider Identifier

1750938700

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Registry record

Entity type Organization (Type 2)

Legal business name Guillemin Counseling LLC

Practice address 427 Columbia Rd Ste 113, Hanover, MA, 02339

Phone (617) 388-4617

Enumeration date Aug 23, 2019

Last updated in NPPES Aug 23, 2019

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Authorized official

Name Julie Guillemin

Title Owner

Phone (617) 388-4617

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

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Guillemin Counseling LLC?

Guillemin Counseling LLC is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).

Providers at this address

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Marley Rooslet Clinical Social Worker · Hanover, MA NPI 1457676413

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-23.