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

William Braeske Dreyer Jr., M.D.

Ophthalmology Physician in Port Saint Lucie, FL · enumerated 2009.

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

National Provider Identifier

1821327412

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Registry record

Entity type Individual (Type 1)

Name William Braeske Dreyer Jr.

Credential M.D.

Sex Male

Practice address Port Saint Lucie, FL, 34952

Phone (772) 337-2020

Fax (772) 337-1704

Enumeration date Dec 10, 2009

Last updated in NPPES Feb 2, 2010

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

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License ME 35786 (FL) Primary

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
180010527	Other	-	RAILROAD MEDICARE
039720200	Medicaid	FL	-

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.

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Frequently asked questions

How do I verify William Dreyer's NPI record?

Cross-check NPI 1821327412 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821327412 active?

Yes, as of the latest NPPES snapshot, NPI 1821327412 is active (record last updated 2010-02-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-02.