Marshall A. Longnecker, M.D., S.c
NPI 1639125933 · Pain Medicine (Anesthesiology) Physician · Green Bay, WI
Marshall A. Longnecker, M.D., S.c is a Pain Medicine (Anesthesiology) Physician organization in Green Bay, WI (NPI 1639125933).
Provider details
- NPI number
- 1639125933
- Entity type
- Organization
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Marshall Longnecker, Authorized Official(920) 433-3500
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Anesthesiology Physician207L00000X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-26
- Last updated
- 2025-09-11
Frequently asked questions
- What is Marshall A. Longnecker, M.D., S.c's NPI number?
- Marshall A. Longnecker, M.D., S.c's National Provider Identifier (NPI) is 1639125933, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Marshall A. Longnecker, M.D., S.c?
- Marshall A. Longnecker, M.D., S.c is classified in the NPPES registry as Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall A. Longnecker, M.D., S.c located?
- Marshall A. Longnecker, M.D., S.c's practice location on file with NPPES is 744 S Webster Ave, Green Bay, WI 54301-3505.
- What is Marshall A. Longnecker, M.D., S.c's phone number?
- The practice phone number listed in the NPPES registry for Marshall A. Longnecker, M.D., S.c is (920) 433-3500.
- Who is the authorized official for Marshall A. Longnecker, M.D., S.c?
- The authorized official listed on Marshall A. Longnecker, M.D., S.c's NPPES record is Marshall Longnecker, Authorized Official. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Marshall A. Longnecker, M.D., S.c's NPI active?
- Yes — Marshall A. Longnecker, M.D., S.c's NPI (1639125933) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.