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

Mrs. Marianela Villanueva, MT

Clinical Medical Laboratory in Mayaguez, PR · enumerated 2006.

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

National Provider Identifier

1043304652

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marianela Villanueva

Credential MT

Sex Female

Practice address Mayaguez, PR, 00680

Phone (787) 832-2345

Fax (787) 832-2345

Enumeration date Oct 3, 2006

Last updated in NPPES Jul 21, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

291U00000X Clinical Medical Laboratory Laboratories · License 995 (PR) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Marianela Villanueva's NPI record?

Cross-check NPI 1043304652 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1043304652 active?

Yes, as of the latest NPPES snapshot, NPI 1043304652 is active (record last updated 2022-07-21).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.