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

Dr. Alan Giangreco, D.D.S.

General Practice Dentistry in North Tonawanda, NY · enumerated 2006.

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

National Provider Identifier

1639193378

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Registry record

Entity type Individual (Type 1)

Name Dr. Alan Giangreco

Credential D.D.S.

Sex Male

Practice address North Tonawanda, NY, 14120

Phone (716) 692-2255

Enumeration date Jul 26, 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

1223G0001X General Practice Dentistry Dental Providers · License 037541 (NY) 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
400057	Other	NY	IH ID#
000730205001	Other	NY	BC/BS OF WNY ID#
455493	Other	PA	UNITED CONCORDIA ID#

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 Alan Giangreco?

The National Provider Identifier (NPI) for Alan Giangreco is 1639193378, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alan Giangreco practice?

The practice location on file with NPPES is in North Tonawanda, NY. 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.