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Marshall A. Longnecker, M.D., S.C

Pain Medicine (Anesthesiology) Physician in Green Bay, WI · enumerated 2006 · authorized official Marshall Longnecker, Authorized Official.

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

National Provider Identifier

1639125933

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Registry record

Entity type Organization (Type 2)
Legal business name Marshall A. Longnecker, M.D., S.C
Practice address 744 S Webster Ave, Green Bay, WI, 54301
Phone (920) 433-3500
Enumeration date May 26, 2006
Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians Secondary
207LP2900X Pain Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Marshall Longnecker
Title Authorized Official
Phone (920) 433-3500

Other identifiers

Identifier Type State Issuer
31790300 Medicaid WI -

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.

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Frequently asked questions

Who is the authorized official for Marshall A. Longnecker, M.D., S.C?
NPPES lists Marshall Longnecker (Authorized Official) as the authorized official for this organization.
What is the NPI number for Marshall A. Longnecker, M.D., S.C?
The NPI for Marshall A. Longnecker, M.D., S.C is 1639125933, 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 2025-09-11.