Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nathan Alfons Kruger, M.D.

Cardiovascular Disease Physician in North Haven, CT · enumerated 2006.

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

National Provider Identifier

1801992417

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Registry record

Entity type Individual (Type 1)

Name Dr. Nathan Alfons Kruger

Credential M.D.

Sex Male

Practice address 2 Devine Street, Suite # 1, North Haven, CT, 06473

Phone (203) 789-2272

Fax (203) 865-8614

Enumeration date Sep 15, 2006

Last updated in NPPES Feb 27, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 043929 (CT) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 043929 (CT) 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

Where does Nathan Kruger practice?

The practice location on file with NPPES is in North Haven, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Nathan Kruger?

The National Provider Identifier (NPI) for Nathan Kruger is 1801992417, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-02-27.