Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Heidi Lack, Phd, Atr-Bc

Q: What type of organization is Heidi Lack, Phd, Atr-Bc?

Heidi Lack, Phd, Atr-Bc is registered in NPPES as a Mental Health Clinic/Center (Including Community Mental Health Center) (its primary provider taxonomy).

Mental Health Clinic/Center (Including Community Mental Health Center) in Lexington, MA · enumerated 2014 · authorized official Heidi Lack, Director, Psychologistart Therapist.

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

National Provider Identifier

1740697523

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Heidi Lack, Phd, Atr-Bc

Practice address 16 Clarke St Ste 23, Lexington, MA, 02421

Phone (781) 863-8696

Enumeration date Jul 14, 2014

Last updated in NPPES Jul 14, 2014

Taxonomy & classification

261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities · License 7518 (MA) Primary

261QM0850X Adult Mental Health Clinic/Center Ambulatory Health Care Facilities · License 7518 (MA) Secondary

261QM0855X Adolescent and Children Mental Health Clinic/Center Ambulatory Health Care Facilities · License 7518 (MA) Secondary

Authorized official

Name Heidi Lack

Title Director, Psychologistart Therapist

Phone (781) 863-8696

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 type of organization is Heidi Lack, Phd, Atr-Bc?

Heidi Lack, Phd, Atr-Bc is registered in NPPES as a Mental Health Clinic/Center (Including Community Mental Health Center) (its primary provider taxonomy).

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-07-14.