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Carstensen Internal Medicine Pllc

Internal Medicine Physician in Key West, FL · enumerated 2009 · authorized official John Carstensen, Sole Owner of Pllc.

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

National Provider Identifier

1699008102

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Registry record

Entity type Organization (Type 2)
Legal business name Carstensen Internal Medicine Pllc
Practice address 2505 Flagler Ave, Key West, FL, 33040
Phone (305) 295-6790
Fax (305) 328-8212
Enumeration date Sep 15, 2009
Last updated in NPPES Sep 11, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License ME105681 (FL) Primary

Authorized official

Name John Carstensen
Title Sole Owner of Pllc
Phone (305) 295-6790

Other identifiers

Identifier Type State Issuer
001716400 Medicaid FL -

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.

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Frequently asked questions

What is the NPI number for Carstensen Internal Medicine Pllc?
The NPI for Carstensen Internal Medicine Pllc is 1699008102, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Carstensen Internal Medicine Pllc?
NPPES lists John Carstensen (Sole Owner of Pllc) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-11.