Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John M Giambalvo

Registered Nurse in Chico, CA · enumerated 2009.

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

National Provider Identifier

1124352422

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Registry record

Entity type Individual (Type 1)

Name Mr. John M Giambalvo

Sex Male

Practice address 2639 Forest Ave, Suite 110, Chico, CA, 95928

Phone (530) 899-2255

Enumeration date Sep 21, 2009

Last updated in NPPES Sep 21, 2009

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 757495 (CA) Primary

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

What specialty is John Giambalvo?

John Giambalvo is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Juanita Whitworth Registered Nurse · Chico, CA NPI 1528219425 Lindsey Rebell Licensed Vocational Nurse · Chico, CA NPI 1295970267 Michele Froehlich Licensed Vocational Nurse · Chico, CA NPI 1083852925 Nurses & Professional Healthcare Mental Illness Intermediate Care Facility · Chico, CA NPI 1154553741 Shari Adcock Licensed Vocational Nurse · Chico, CA NPI 1316272966 Ladonna Wood Licensed Vocational Nurse · Chico, CA NPI 1962790766 Sarah Ladd Licensed Vocational Nurse · Chico, CA NPI 1063791465 Cari Elkins Licensed Vocational Nurse · Chico, CA NPI 1801166871

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-21.