Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William W Mayo-Smith, MD

Diagnostic Radiology Physician in East Providence, RI · enumerated 2005.

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

National Provider Identifier

1851389720

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Registry record

Entity type Individual (Type 1)

Name William W Mayo-Smith

Credential MD

Sex Male

Practice address 20 Catamore Blvd, East Providence, RI, 02914

Phone (401) 432-2520

Fax (401) 432-2457

Enumeration date Oct 13, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 08847 (RI) 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
005221	Other	-	BLUECHIP
008847	Other	-	BLUESHIELD
3092879	Other	-	HEALTHYSTART
000000001988	Other	-	NHPRI
3092879	Other	-	MASSMEDICAID
725009	Other	-	TUFTS
1600241	Other	-	UNITEDHEALTHPLANS
240093	Other	-	RIHPILGRIM
7004723	Other	-	RIMEDICALASSISTANCE

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 Mayo-Smith?

The National Provider Identifier (NPI) for William Mayo-Smith is 1851389720, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Mayo-Smith practice?

The practice location on file with NPPES is in East Providence, RI. 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 2007-07-08.