Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Lucius Sinks, MD

Urology Physician in Madison, WI · enumerated 2026.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1164365425

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Registry record

Entity type Individual (Type 1)

Name Alexander Lucius Sinks

Credential MD

Sex Male

Practice address Uw Hospitals & Clinics 600 Highland Ave, Madison, WI, 53792

Phone (608) 263-6400

Enumeration date Apr 13, 2026

Last updated in NPPES Jun 14, 2026

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 102229851 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

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 Alexander Sinks?

Alexander Sinks 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-14.