Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karla F. Velez Rivera, MD

Internal Medicine Physician in Mayaguez, PR · enumerated 2009 · practices at Island Surgical Associates LLC.

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

National Provider Identifier

1801039961

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Registry record

Entity type Individual (Type 1)

Name Karla F. Velez Rivera

Credential MD

Sex Female

Practice address Mayaguez Medical Center, Hostos Ave. 410, Mayaguez, PR, 00681

Phone (787) 376-0407

Enumeration date Apr 19, 2009

Last updated in NPPES Mar 1, 2011

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 18033 (PR) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1801039961 active?

Yes, as of the latest NPPES snapshot, NPI 1801039961 is active (record last updated 2011-03-01).

How do I verify Karla Velez Rivera's NPI record?

Cross-check NPI 1801039961 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Nelson Valle-Campos Addiction Medicine (Psychiatry & Neurology) Physician · Mayaguez, PR NPI 1164644290 Island Surgical Associates LLC Surgery Physician · Mayaguez, PR NPI 1417739087

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-01.