Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chris Geannopoulos, MD

Cardiovascular Disease Physician in Naperville, IL · enumerated 2006.

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

National Provider Identifier

1265407076

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Registry record

Entity type Individual (Type 1)

Name Chris Geannopoulos

Credential MD

Sex Male

Practice address 100 Spalding Dr Ste 400, Naperville, IL, 60540

Phone (630) 718-2660

Fax (630) 718-2667

Enumeration date Feb 23, 2006

Last updated in NPPES Aug 8, 2023

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 036077483 (IL) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036077483 (IL) 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
036077483	Medicaid	IL	-

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

How do I verify Chris Geannopoulos's NPI record?

Cross-check NPI 1265407076 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1265407076 active?

Yes, as of the latest NPPES snapshot, NPI 1265407076 is active (record last updated 2023-08-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-08.