Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Chapter One Counseling LLC

Q: What is the NPI number for Chapter One Counseling LLC?

The NPI for Chapter One Counseling LLC is 1730024951, a Type 2 (organization) record in the CMS NPPES registry.

Clinical Social Worker in Berlin, CT · enumerated 2026 · authorized official Brianna Marks, Owner/Executive Clinician.

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

National Provider Identifier

1730024951

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Registry record

Entity type Organization (Type 2)

Legal business name Chapter One Counseling LLC

Practice address 659 Chamberlain Hwy, Berlin, CT, 06037

Phone (860) 255-4638

Enumeration date Apr 22, 2026

Last updated in NPPES Apr 22, 2026

Taxonomy & classification

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

Authorized official

Name Brianna Marks

Title Owner/Executive Clinician

Phone (860) 255-4638

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

Who is the authorized official for Chapter One Counseling LLC?

NPPES lists Brianna Marks (Owner/Executive Clinician) as the authorized official for this organization.

What is the NPI number for Chapter One Counseling LLC?

The NPI for Chapter One Counseling LLC is 1730024951, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-22.