Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Seidl, PA
Physician Assistant in Wausau, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740296821
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Registry record
Entity type Individual (Type 1)
Name William Seidl
Credential PA
Sex Male
Practice address 2727 Plaza Dr, Wausau, WI, 54401
Phone (715) 847-3000
Enumeration date Jul 31, 2006
Last updated in NPPES Aug 23, 2011
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 198-023 (WI) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 42930400 | 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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is William Seidl?
William Seidl is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Robin Henley Family Medicine Physician · Wausau, WI NPI 1710982723 Janice Soczka Family Nurse Practitioner · Wausau, WI NPI 1598752925 Shelley Danielson Certified Registered Nurse Anesthetist · Wausau, WI NPI 1265418909 David Mathias Pediatrics Physician · Wausau, WI NPI 1295714723 Kristin Ruesch Physician Assistant · Wausau, WI NPI 1578533949 John Westberg Certified Registered Nurse Anesthetist · Wausau, WI NPI 1255302337 Antoinette Hayek Family Medicine Physician · Wausau, WI NPI 1255390209 Thomas Hupy Emergency Medicine Physician · Wausau, WI NPI 1144255274
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-08-23.