Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William D Borkon, MD
Urology Physician in Friendship, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417934605
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Registry record
Entity type Individual (Type 1)
Name Dr. William D Borkon
Credential MD
Sex Male
Practice address 402 W Lake St, Friendship, WI, 53934
Phone (608) 339-3331
Enumeration date Dec 28, 2005
Last updated in NPPES Jun 7, 2017
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 |
|---|---|---|---|
| 304505600 | Medicaid | MN | - |
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 Borkon?
William Borkon is registered in NPPES with the primary taxonomy of Urology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Stephen Paulk Surgery Physician · Friendship, WI NPI 1467446492 Paul Kornaus Family Medicine Physician · Friendship, WI NPI 1689657827 Phillips Roche A Cri Clinic Pharmacy Inc Community/Retail Pharmacy · Friendship, WI NPI 1841261302 Ramakrishnan Sankaran General Practice Physician · Friendship, WI NPI 1831168848 Rahmatollah Simani General Practice Physician · Friendship, WI NPI 1104895010 Martin Janssen General Practice Physician · Friendship, WI NPI 1417926023 Tamara Daniels Emergency Medicine Physician · Friendship, WI NPI 1164488169 Moundview Memorial Hospital & Clinics, Inc Critical Access Hospital · Friendship, WI NPI 1710939533
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-07.