Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Donald Gieseke, MD

Surgery Physician in Delray Beach, FL · enumerated 2005.

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

National Provider Identifier

1407837354

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Registry record

Entity type Individual (Type 1)

Name Dr. William Donald Gieseke

Credential MD

Sex Male

Practice address Delray Beach, FL, 33484

Phone (561) 499-8025

Fax (561) 496-7949

Enumeration date Nov 8, 2005

Last updated in NPPES May 12, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License ME15914 (FL) 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

What is the NPI number for William Gieseke?

The National Provider Identifier (NPI) for William Gieseke is 1407837354, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Gieseke practice?

The practice location on file with NPPES is in Delray Beach, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-12.