Gregory A. Holzhei, D.O.

NPI 1073585444ActiveIndividual· Family Medicine· Saint Johns, MI

Family Medicine (D.O.) with Sparrow Clinton Hospital, practicing in Saint Johns, Michigan. Their prescriptions cost Medicare Part D more than their services did: $838,169 for 8,298 claims, against $3,121 paid for services in 2024. Lists Edward W Sparrow Hospital and 2 other hospitals as hospital affiliations.

Overview

NPI	1073585444
Status	Active
Entity type	Individual
Credential	D.O.
Sole proprietor	No
NPI issued	Feb 1, 2006
Last updated in NPPES	Jan 9, 2012

Specialties and licenses

Taxonomy	Code	License	State
Family Medicine Primary	207Q00000X	5101013906	MI

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Family Practice (MI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	32
Services billed	98 across 14 procedure codes
Paid by Medicare	$3,121

Part D prescriptions in 2024

Prescriptions (claims)	8,298 · 19,536 30-day fills
Patients	498
Total drug cost	$838,169
Generic share	87% of claims

Medicare sources and data years

Education and affiliations

Graduation year	1998
Medicare specialty	Family Practice

Medical group

Sparrow Clinton HospitalSaint Johns, MI · 24 clinicians

Hospital affiliations

Edward W Sparrow HospitalLansing, MI
University of Michigan Health- Sparrow ClintonSaint Johns, MI
University of Michigan Health-Sparrow CarsonCarson City, MI

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

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