Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carmen Luz Diaz Hernandez, OD

Optometrist in Cayey, PR · enumerated 2005 · practices at Cayey Visual Center, Corp.

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

National Provider Identifier

1366448383

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Registry record

Entity type Individual (Type 1)

Name Carmen Luz Diaz Hernandez

Credential OD

Sex Female

Practice address 5001 Ave Jesus T Pinero Ste 130, Cayey, PR, 00736

Phone (787) 263-1335

Fax (787) 263-1335

Enumeration date Jun 23, 2005

Last updated in NPPES Feb 5, 2021

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 621 (PR) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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

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.

What specialty is Carmen Diaz Hernandez?

Carmen Diaz Hernandez is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Cayey Visual Center, Corp Point of Service · Cayey, PR NPI 1003969353

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-05.