NPI Portal NPI Lookup & Verification

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

Carlos E Martinez Duran, MD

Internal Medicine Physician in Bayamon, PR · enumerated 2005.

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

National Provider Identifier

1700863420

Verified

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Registry record

Entity type Individual (Type 1)
Name Carlos E Martinez Duran
Credential MD
Sex Male
Practice address Bayamon, PR, 00961
Phone (787) 786-3592
Fax (787) 786-3506
Enumeration date Dec 22, 2005
Last updated in NPPES Sep 22, 2010

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 8721 (PR) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
82390MA Other - SSS

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 is the NPI number for Carlos Martinez Duran?
The National Provider Identifier (NPI) for Carlos Martinez Duran is 1700863420, a Type 1 (individual) record in the CMS NPPES registry.
Where does Carlos Martinez Duran practice?
The practice location on file with NPPES is in Bayamon, PR. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-22.