DR. DONALD H GRENZ (MD) – Internal Medicine Physician, NPI 1699720995
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
338 INTERNAL MEDICINE in ND
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Provider Addresses for DR. DONALD H GRENZ (MD)
401, North 9th Street, Bismarck, Burleigh County, North Dakota, 58501, United States
BISMARCK, ND 585014507
Phone: (701) 530-6000
Fax: (701) 530-6430
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-06-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050614000215 | I | Internal Medicine | ND | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| J0897 | Injection, denosumab, 1 mg | 3,120 | 31 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 1,251 | 646 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 258 | 258 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 254 | 186 | $0 |
| 90677 | Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 200 | 199 | $0 |
Insurance plans in this area (ZIP 58501)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | ND | |
| Interventional Radiology | ND | |
| General Surgery | MN | |
| Nurse Practitioner | ND | |
| Physical Therapist In Private Practice | ND | |
| Nurse Practitioner | ND | |
| Hospitalist, Internal Medicine | ND | |
| Family Practice | ND | |
| Nurse Practitioner | MN | |
| Nurse Practitioner | ND |
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