Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Arthur Leffler, LMSW

Clinical Social Worker in Lewisburg, PA · enumerated 2023.

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

National Provider Identifier

1679355267

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Michael Arthur Leffler

Credential LMSW

Sex Male

Practice address 1110 W Market St, Lewisburg, PA, 17837

Phone (570) 701-5424

Enumeration date Oct 18, 2023

Last updated in NPPES Jul 22, 2026

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License CW027056 (PA) Primary

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

Where does Michael Leffler practice?

The practice location on file with NPPES is in Lewisburg, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Michael Leffler?

The National Provider Identifier (NPI) for Michael Leffler is 1679355267, a Type 1 (individual) record in the CMS NPPES registry.

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