Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William J Kasper, MD
Pediatrics Physician in Neenah, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1093709891
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Registry record
Entity type Individual (Type 1)
Name William J Kasper
Credential MD
Sex Male
Practice address 740 Deerwood Ave, Neenah, WI, 54956
Phone (920) 751-9600
Enumeration date Sep 7, 2005
Last updated in NPPES Sep 2, 2008
Taxonomy & licenses
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 |
|---|---|---|---|
| 31830700 | 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 William Kasper 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 William Kasper?
The National Provider Identifier (NPI) for William Kasper is 1093709891, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Patricia Kasper Pediatrics Physician · Neenah, WI NPI 1104811686 Kelly Meyer Pediatrics Physician · Neenah, WI NPI 1194709170 Kevin Gentile Pediatrics Physician · Neenah, WI NPI 1134185861 Ascension Medical Group-Fox Valley Wisconsin, Inc Durable Medical Equipment & Medical Supplies · Neenah, WI NPI 1992853808 Ascension Medical Group-Fox Valley Wisconsin, Inc Multi-Specialty Clinic/Center · Neenah, WI NPI 1134387426 Kim Lederhaus Nurse Practitioner · Neenah, WI NPI 1245477801 Jill Klein Nurse Practitioner · Neenah, WI NPI 1861826273
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-02.