Donald H. Grenz, MD
NPI 1699720995ActiveIndividual· Internal Medicine· Bismarck, ND
Internal Medicine (MD) in Bismarck, North Dakota, trained at University of North Dakota School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $1,716,150 for 15,291 claims, against $240,164 paid for services in 2024.
Overview
| NPI | 1699720995 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 24, 2006 |
| Last updated in NPPES | Jul 25, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 8190 | ND |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (ND) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 593 |
|---|---|
| Services billed | 5,724 across 54 procedure codes |
| Paid by Medicare | $240,164 |
Part D prescriptions in 2024
| Prescriptions (claims) | 15,291 · 34,727 30-day fills |
|---|---|
| Patients | 978 |
| Total drug cost | $1,716,150 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of North Dakota School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Internal Medicine |
Medical group
- Innovis Health LLCFargo, ND · 559 clinicians
Hospital affiliations
- Chi St Alexius HealthBismarck, ND
- Essentia HealthFargo, ND
- Linton Hospital - CahLinton, ND
- Sanford Medical Center BismarckBismarck, ND
- Trinity HospitalsMinot, ND
Other facilities
- Chi Health at HomeHome health agency · Bismarck, ND
- Sanford Home Care - HhaHome health agency · Mandan, ND
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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