Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William J. Mallon, MD

Q: What is the NPI number for William J. Mallon, MD?

The NPI for William J. Mallon, MD is 1649353582, a Type 2 (organization) record in the CMS NPPES registry.

Ophthalmology Physician in Vero Beach, FL · enumerated 2006 · authorized official William Mallon, Owner.

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

National Provider Identifier

1649353582

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Registry record

Entity type Organization (Type 2)

Legal business name William J. Mallon, MD

Other name <Unavail>

Practice address 3500 Us Highway 1, Vero Beach, FL, 32960

Phone (772) 299-1404

Fax (772) 299-1455

Enumeration date Oct 23, 2006

Last updated in NPPES Apr 29, 2025

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License ME78127 (FL) Primary

Authorized official

Name William Mallon

Title Owner

Phone (772) 299-1404

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 J. Mallon, MD?

The NPI for William J. Mallon, MD is 1649353582, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for William J. Mallon, MD?

NPPES lists William Mallon (Owner) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-29.