Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Leichner, LLMP

Psychologist in Saginaw, MI · enumerated 2006.

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

National Provider Identifier

1780768614

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Registry record

Entity type Individual (Type 1)

Name Mr. William Leichner

Credential LLMP

Sex Male

Practice address 500 Hancock Street, Saginaw, MI, 48602

Phone (989) 797-3400

Fax (989) 799-0206

Enumeration date Oct 25, 2006

Last updated in NPPES Apr 26, 2021

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 6361004157 (MI) Secondary

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 6301008502 (MI) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6361004157 (MI) 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

What specialty is William Leichner?

William Leichner is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-26.