Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ismelda Gu

Registered Nurse in San Diego, CA · enumerated 2016.

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

National Provider Identifier

1720445422

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Registry record

Entity type Individual (Type 1)

Name Ismelda Gu

Sex Female

Practice address 5560 Overland Ave, San Diego, CA, 92123

Phone (858) 357-7574

Enumeration date Jan 26, 2016

Last updated in NPPES Jan 26, 2016

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 95061870 (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 Ismelda Gu?

Ismelda Gu 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-26.