Gregory Holzhei, D.O.
NPI 1073585444 · Family Medicine Physician · Saint Johns, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Holzhei, D.O. is a Family Medicine Physician provider in Saint Johns, MI (NPI 1073585444).
Provider details
- NPI number
- 1073585444
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 5101013906 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 136 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 499 | 142 |
| Levothyroxine Sodium | 432 | 119 |
| Amlodipine Besylate | 395 | 111 |
| Atorvastatin Calcium | 305 | 89 |
| Simvastatin | 296 | 81 |
| Metformin Hcl | 217 | 66 |
| Gabapentin | 200 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-01
- Last updated
- 2012-01-09
Frequently asked questions
- What is Gregory Holzhei's NPI number?
- Gregory Holzhei's National Provider Identifier (NPI) is 1073585444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Holzhei's specialty?
- Gregory Holzhei is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Holzhei located?
- Gregory Holzhei's practice location on file with NPPES is 901 S Oakland St, Saint Johns, MI 48879-2200.
- What is Gregory Holzhei's phone number?
- The practice phone number listed in the NPPES registry for Gregory Holzhei is (989) 224-2338.
- Does Gregory Holzhei accept Medicare?
- Gregory Holzhei is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Holzhei's NPI active?
- Yes — Gregory Holzhei's NPI (1073585444) is active in the NPPES registry as of the last update on 2012-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.