Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael C Willoughby, D.O.

Cardiovascular Disease Physician in Mount Clemens, MI · enumerated 2009.

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

National Provider Identifier

1457589582

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael C Willoughby

Credential D.O.

Sex Male

Practice address 1000 Harrington St, Mount Clemens, MI, 48043

Phone (586) 493-8000

Enumeration date Jun 27, 2009

Last updated in NPPES Aug 22, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5101018254 (MI) Secondary

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 5101018254 (MI) Secondary

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 036137782 (IL) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Michael Willoughby?

The National Provider Identifier (NPI) for Michael Willoughby is 1457589582, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Willoughby practice?

The practice location on file with NPPES is in Mount Clemens, MI. 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 2025-08-22.