Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lisa R Muller, LCSW

Clinical Social Worker in Wallingford, CT · enumerated 2012.

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

National Provider Identifier

1689947772

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Registry record

Entity type Individual (Type 1)

Name Lisa R Muller

Credential LCSW

Sex Female

Practice address Wallingford, CT, 06492

Phone (203) 768-8421

Fax (203) 265-0798

Enumeration date Feb 20, 2012

Last updated in NPPES Mar 26, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 006009 (CT) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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

How do I verify Lisa Muller's NPI record?

Cross-check NPI 1689947772 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689947772 active?

Yes, as of the latest NPPES snapshot, NPI 1689947772 is active (record last updated 2012-03-26).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-26.