Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Hato Rey Pathology Associates Inc

Clinical Medical Laboratory in San Juan, PR · enumerated 2007 · authorized official Guillermo Villarmarzo, President.

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

National Provider Identifier

1740460583

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Hato Rey Pathology Associates Inc

Other name <Unavail>

Practice address 300 -302 Ave Domenech, Urb Baldrich, San Juan, PR, 00918

Phone (787) 765-7320

Fax (787) 756-7546

Enumeration date Nov 9, 2007

Last updated in NPPES Mar 16, 2022

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories · License 533B (PR) Primary

291U00000X Clinical Medical Laboratory Laboratories · License 1085 (PR) Secondary

Authorized official

Name Guillermo Villarmarzo

Title President

Phone (787) 765-7320

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

What type of organization is Hato Rey Pathology Associates Inc?

Hato Rey Pathology Associates Inc is registered in NPPES as a Clinical Medical Laboratory (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-16.