Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Patrick James Brennan, M.D.
Surgery Physician in Neenah, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104876945
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Registry record
Entity type Individual (Type 1)
Name Patrick James Brennan
Credential M.D.
Sex Male
Practice address 100 Theda Clark Medical Plz, Suite 400, Neenah, WI, 54956
Phone (920) 725-4527
Fax (920) 725-0991
Enumeration date May 11, 2006
Last updated in NPPES May 8, 2008
Taxonomy & licenses
2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 44570 (WI) Secondary
2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License 44570 (WI) Secondary
2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 44570 (WI) Secondary
208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 44570 (WI) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 34211900 | 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.
Frequently asked questions
Where does Patrick Brennan practice?
The practice location on file with NPPES is in Neenah, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Patrick Brennan?
The National Provider Identifier (NPI) for Patrick Brennan is 1104876945, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-08.