Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alexandros Nantsios, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Saint Louis, MO · enumerated 2026.

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

National Provider Identifier

1811837198

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexandros Nantsios

Credential MD

Sex Male

Practice address 660 S Euclid Ave, Saint Louis, MO, 63110

Phone (314) 362-7260

Enumeration date Mar 30, 2026

Last updated in NPPES Apr 7, 2026

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 2025008245 (MO) 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.

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Frequently asked questions

What is the NPI number for Alexandros Nantsios?

The National Provider Identifier (NPI) for Alexandros Nantsios is 1811837198, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alexandros Nantsios practice?

The practice location on file with NPPES is in Saint Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-07.