Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Albert Maiorino Jr., MD

Anesthesiology Physician in West Islip, NY · enumerated 2005.

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

National Provider Identifier

1508840174

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Registry record

Entity type Individual (Type 1)

Name William Albert Maiorino Jr.

Credential MD

Sex Male

Practice address 1000 Montauk Hwy, Good Samaritan Hospital, West Islip, NY, 11795

Phone (631) 376-4088

Enumeration date Dec 6, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 186588 (NY) 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
01552565	Medicaid	NY	-

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 Maiorino?

The National Provider Identifier (NPI) for William Maiorino is 1508840174, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Maiorino practice?

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

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