Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Clarence Geisert, MD

Orthopaedic Surgery Physician in Fleming Island, FL · enumerated 2012.

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

National Provider Identifier

1336415736

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Registry record

Entity type Individual (Type 1)

Name Dr. William Clarence Geisert

Credential MD

Sex Male

Practice address 4565 Us Highway 17 Ste 2200, Fleming Island, FL, 32003

Phone (904) 634-0640

Fax (904) 634-0203

Enumeration date Mar 29, 2012

Last updated in NPPES Aug 5, 2025

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 4301100411 (MI) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 01086351A (IN) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 74275 (AZ) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License ME174253 (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

How do I verify William Geisert's NPI record?

Cross-check NPI 1336415736 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1336415736 active?

Yes, as of the latest NPPES snapshot, NPI 1336415736 is active (record last updated 2025-08-05).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-05.