Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael John Essenmacher, DO

Hospitalist Physician in Grand Rapids, MI · enumerated 2018.

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

National Provider Identifier

1457845075

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Registry record

Entity type Individual (Type 1)

Name Michael John Essenmacher

Credential DO

Sex Male

Practice address 200 Jefferson Ave Se, Grand Rapids, MI, 49503

Phone (616) 685-6919

Enumeration date Jun 18, 2018

Last updated in NPPES Apr 22, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5101023957 (MI) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5151012747 (MI) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 5151012747 (MI) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Michael Essenmacher practice?

The practice location on file with NPPES is in Grand Rapids, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Michael Essenmacher?

The National Provider Identifier (NPI) for Michael Essenmacher is 1457845075, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-22.