Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Louanne Lane Giangreco, MD

Emergency Medicine Physician in Hayward, CA · enumerated 2006.

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

National Provider Identifier

1740390574

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Registry record

Entity type Individual (Type 1)

Name Louanne Lane Giangreco

Credential MD

Sex Female

Practice address 22331 Mission Blvd, Hayward, CA, 94541

Phone (510) 471-5880

Enumeration date Aug 30, 2006

Last updated in NPPES Aug 14, 2024

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License ME164287 (RI) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 69938 (TN) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License ME164287 (FL) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 236573 (NY) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD.47637 (AL) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License C198335 (CA) 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
02683714	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.

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Frequently asked questions

How do I verify Louanne Giangreco's NPI record?

Cross-check NPI 1740390574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1740390574 active?

Yes, as of the latest NPPES snapshot, NPI 1740390574 is active (record last updated 2024-08-14).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-14.