NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Muerk Internal Medicine Group

Internal Medicine Physician in Fajardo, PR · enumerated 2011 · authorized official Jose Mues, Internal Medicine.

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

National Provider Identifier

1366739765

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Muerk Internal Medicine Group
Practice address Fajardo Medical Plaza, Suite 108 Calle Union Esq Celix Aguilara #10, Fajardo, PR, 00738
Phone (787) 860-5450
Fax (787) 860-5450
Enumeration date Jul 6, 2011
Last updated in NPPES Jul 6, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 8420 (PR) Primary

Authorized official

Name Jose Mues
Title Internal Medicine
Phone (787) 860-5450

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

Who is the authorized official for Muerk Internal Medicine Group?
NPPES lists Jose Mues (Internal Medicine) as the authorized official for this organization.
What is the NPI number for Muerk Internal Medicine Group?
The NPI for Muerk Internal Medicine Group is 1366739765, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-06.