Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Institute for Attachment & Child Development, Inc.

Clinical Social Worker in Littleton, CO · enumerated 2007 · authorized official Forrest Lien, Executive Director.

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

National Provider Identifier

1871795963

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Registry record

Entity type Organization (Type 2)

Legal business name Institute for Attachment & Child Development, Inc.

Practice address 5921 Middlefield Rd Ste 201, Littleton, CO, 80123

Phone (303) 674-1910

Fax (303) 670-3983

Enumeration date Jun 1, 2007

Last updated in NPPES Apr 19, 2016

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 992444 (CO) Primary

Authorized official

Name Forrest Lien

Title Executive Director

Phone (303) 674-1910

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 Institute for Attachment & Child Development, Inc.?

NPPES lists Forrest Lien (Executive Director) as the authorized official for this organization.

What is the NPI number for Institute for Attachment & Child Development, Inc.?

The NPI for Institute for Attachment & Child Development, Inc. is 1871795963, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-19.