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

Joanna Mercado/Alvarado

Emergency Medical Services (Emergency Medicine) Physician in Carolina, PR · enumerated 2005.

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

National Provider Identifier

1811974496

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Registry record

Entity type Individual (Type 1)

Name Joanna Mercado/Alvarado

Sex Female

Practice address Carolina, PR, 00987

Phone (787) 757-1800

Fax (787) 750-0930

Enumeration date Dec 27, 2005

Last updated in NPPES Nov 1, 2010

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

Taxonomy & licenses

207PE0004X Emergency Medical Services (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 15353 (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 Joanna Mercado/Alvarado's NPI record?

Cross-check NPI 1811974496 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811974496 active?

Yes, as of the latest NPPES snapshot, NPI 1811974496 is active (record last updated 2010-11-01).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-11-01.