Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Marshall A. Longnecker, MD, SC

Organization Anesthesiology Physician · NPI 1639125933

Marshall A. Longnecker, MD, SC is an Anesthesiology Physician in Green Bay, Wisconsin. Registered with an NPI since 2006.

In the registry since
2006
Specialties on file
2

Practice location Address checks out

744 S Webster Ave
Green Bay, WI 54301-3505
Phone: (920) 433-3500
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pain Medicine (Anesthesiology) Physician (primary) Taxonomy 207LP2900X
Anesthesiology Physician Taxonomy 207L00000X

Record details

NPI number1639125933
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Marshall Longnecker — Authorized Official · (920) 433-3500
NPI enumeratedMay 26, 2006
Last updated in NPPESSeptember 11, 2025
Mailing address225 S Executive Dr, Brookfield, WI 53005-4266

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