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

Dr. William Byron Rossman Jr., DDS

Dentist in Islamorada, FL · enumerated 2006.

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

National Provider Identifier

1437234846

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Registry record

Entity type Individual (Type 1)

Name Dr. William Byron Rossman Jr.

Credential DDS

Sex Male

Practice address Islamorada, FL, 33036

Phone (305) 664-4282

Fax (305) 664-0694

Enumeration date Oct 25, 2006

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License 4957 (FL) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
FL 4957	Other	FL	DENTAL LICENSE NUMBER

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 Rossman?

The National Provider Identifier (NPI) for William Rossman is 1437234846, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Rossman practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.