Gregory A. Holzhei, D.O.
Family Medicine Physician · Saint Johns, MI
Gregory A. Holzhei, D.O. is a family medicine physician with a practice address in Saint Johns, Michigan, and NPI 1073585444, issued on Feb 1, 2006. Check the license (Michigan 5101013906, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Gregory A. Holzhei
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 5101013906 MI
Self-reported in NPPES; status is on the state search - Practice location
- 901 S Oakland St, Saint Johns, MI 48879
- Phone
- (989) 224-2338
- Enumerated
- Feb 1, 2006
- Record last updated
- Jan 9, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (989) 224-2065
- Medicaid ID
- 4474532 MI
- Medicare enrollment
- Enrolled (PECOS I20120209000608); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 901 S Oakland St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Beaman Haske, RPHPharmacist1114050721
- Justin Keeler, PHARM.D.Pharmacist1861285843
- Kay McLaughlin, D.O.Internal Medicine Physician1407827868
- Mary PaxtonPharmacist1497603096
- Danielle Rodewald, PHARMDPharmacist1093377962
- Stephanie Schmitt, NP-CFamily Nurse Practitioner1396497525
Verify Gregory A. Holzhei in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101013906Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average family medicine physician in 2024
8,298 Medicare Part D claims for 498 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 328 claims were for opioids.
Most prescribed
- Lisinopril499 claims
- Levothyroxine Sodium432 claims
- Amlodipine Besylate395 claims
- Atorvastatin Calcium305 claims
- Simvastatin296 claims
- Metformin Hcl217 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Sparrow Clinton HospitalSaint Johns, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
8 family medicine physician records list a practice address in Saint Johns
They are 8 of the 207 NPPES records with a practice address in Saint Johns, and 6,013 family medicine physician records in Michigan.
All 8 in Saint Johns → All 6,013 in Michigan → Every provider in Saint Johns →
Other family medicine physician records in Michigan
- Asma AbbasHamtramck, MI1982946463
- Saadia Abbas, MDChesterfield, MI1619136868
- Faezeh AbbasiMonroe, MI1144065921
- Layla Abbasi, MDWayne, MI1346177607
- Marisa Abbo, DORochester Hills, MI1184605388
- Cathleen Abbott, M.D.East Lansing, MI1275630501
- Leah Abbott, MDGwinn, MI1760987341
- Nina Abboud, DORochester Hills, MI1639750557
- Ryan Abboud, DOBingham Farms, MI1104353077
- Christina Abd, MDSterling Heights, MI1770371965
Common questions
What is Gregory A. Holzhei, D.O.'s NPI number?
Gregory A. Holzhei, D.O.'s National Provider Identifier (NPI) is 1073585444, issued on Feb 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Holzhei, D.O. located?
The NPPES record lists a practice address at 901 S Oakland St, Saint Johns, MI, 48879. Phone: (989) 224-2338. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Holzhei, D.O.'s license?
NPPES lists Michigan license number 5101013906, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory A. Holzhei, D.O. prescribe under Medicare Part D?
In 2024, Gregory A. Holzhei, D.O. had 8,298 Medicare Part D claims for 498 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.