Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sierracounseling & Mediation, LLC

Marriage & Family Therapist in Belleville, IL · enumerated 2009 · authorized official Vivian Sierra, Director.

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

National Provider Identifier

1710215454

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Registry record

Entity type Organization (Type 2)

Legal business name Sierracounseling & Mediation, LLC

Practice address 6609 W Main St, Suite A, Belleville, IL, 62223

Phone (618) 398-6552

Fax (618) 398-0075

Enumeration date Nov 18, 2009

Last updated in NPPES Nov 18, 2009

Taxonomy & classification

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 166.000561 (IL) Primary

Authorized official

Name Vivian Sierra

Title Director

Phone (618) 398-6552

Other identifiers

Identifier	Type	State	Issuer
1639199854	Other	IL	INDIVIDUAL NPI

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 Sierracounseling & Mediation, LLC?

Sierracounseling & Mediation, LLC is registered in NPPES as a Marriage & Family Therapist (its primary provider taxonomy).

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Vivian Sierra Marriage & Family Therapist · Belleville, IL NPI 1639199854

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-18.