Gregory S. Granzeier, DO
NPI 1134239320ActiveIndividual· Obstetrics & Gynecology· Roscoe, IL
Obstetrics & Gynecology (DO) in Roscoe, Illinois, trained at New York College of Osteo Medicine of New York Institute of Technology (class of 1991). Mostly services rather than prescriptions: Medicare paid $3,350 for 38 patients in 2024, with only 46 Part D claims.
Overview
| NPI | 1134239320 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Jan 21, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 036-094024 | IL |
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 - Obstetrics/Gynecology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 38 |
|---|---|
| Services billed | 73 across 19 procedure codes |
| Paid by Medicare | $3,350 |
Part D prescriptions in 2024
| Prescriptions (claims) | 46 · 58 30-day fills |
|---|---|
| Patients | 21 |
| Total drug cost | $3,676 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | New York College of Osteo Medicine of New York Institute of Technology |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Obstetrics/Gynecology |
Medical groups
- Rockford Health PhysiciansRockford, IL · 521 clinicians
- Cgh Medical CenterSterling, IL · 197 clinicians
Hospital affiliations
- Cgh Medical CenterSterling, IL
- Javon Bea HospitalRockford, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other OB-GYNs in Roscoe
- 1255565115
- 1598701088
- 1275768087