Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Willis Ko, MD

Interventional Cardiology Physician in Maryville, IL · enumerated 2017.

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

National Provider Identifier

1215465307

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Willis Ko

Credential MD

Sex Male

Practice address 6810 State Route 162 Ste 102b, Maryville, IL, 62062

Phone (618) 288-4076

Fax (618) 288-4215

Enumeration date Jun 1, 2017

Last updated in NPPES Sep 19, 2025

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 036171090 (IL) Primary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License MT213475 (PA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MT213475 (PA) Secondary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 2024024174 (MO) Secondary

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

Is NPI 1215465307 active?

Yes, as of the latest NPPES snapshot, NPI 1215465307 is active (record last updated 2025-09-19).

How do I verify Willis Ko's NPI record?

Cross-check NPI 1215465307 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-19.