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Edit this profileAt a glance
- 401 N 9Th St, Bismarck, ND 58501
About Dr. Grenz
Based in Bismarck, ND, Donald H. Grenz, MD is listed in the NPI registry under internal medicine. Donald graduated from University of North Dakota School of Medicine in 1997. Medicare claims data shows Donald provided 5,535 services to 2,211 patients. The services billed most often include injection, denosumab, 1 mg, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and insertion of needle into vein for collection of blood sample. NPI 1699720995 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (701) 530-6000
- Email not available
Practice Locations
401 N 9TH ST
Bismarck, ND 58501
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
- Heart disease
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive and evaluation
- Medication management
- Post-hospital transitional care
Screening and diagnostic testing
- EKG
- Spirometry
Bones & Joints
Brain and nerves
Cancer screening
- Colon Cancer Screening Referral
- Mammogram Referral
Digestive
Exams & Consultations
- Pre-Op Clearance Exam
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart health
- Cardiac Stress Test Referral
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Lab tests
Lungs & Breathing
- At-Home Sleep Study Order
Metabolic & Weight
- Weight Loss Injections and Medication
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Pain management
Preventive & Routine Care
Screenings & Diagnostics
- Bone Density Scan Referral
- Diabetes Screening and A1C Test
Sexual health
- STI Testing
Procedures Most Often Billed to Medicare
5,535 services · 2,211 patients · 18 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
500 | More often than most peers in Internal Medicine |
| X-ray of chest, 2 views | Imaging | 71046 |
48 | More often than most peers in Internal Medicine |
| X-ray of lower and sacral spine, 2-3 views | Imaging | 72100 |
15 | Less often than most peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
79 | More often than most peers in Internal Medicine |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
68 | More than most peers in Internal Medicine |
| Influenza vaccine, inactivated | Treatment | 90653 |
52 | More often than most peers in Internal Medicine |
| Routine electrocardiogram (ecg) using at least 12 leads with tracing | Treatment | 93005 |
44 | More often than most peers in Internal Medicine |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
19 | Less often than most peers in Internal Medicine |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
19 | Less often than most peers in Internal Medicine |
| Injection, denosumab, 1 mg | Drug given | J0897 |
2,760 | More often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other internists in Bismarck 6
Same specialty, same city.
Trained at University of North Dakota School of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 1997 at University of North Dakota School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 6
Providers in ND who bill this service to Medicare most often.
Common questions
What is Dr. Grenz's specialty?
Dr. Grenz is an internist in Bismarck, ND. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find Dr. Grenz?
Dr. Grenz is listed at 401 N 9Th St, Bismarck, ND 58501. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Grenz?
The number on file is (701) 530-6000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Grenz?
Dr. Grenz's National Provider Identifier is 1699720995. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Grenz's medical education?
Dr. Grenz attended University of North Dakota School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Grenz have?
Dr. Grenz has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Grenz known for?
According to Medicare billing data, Dr. Grenz performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as x-ray of chest, 2 views and x-ray of lower and sacral spine, 2-3 views; provides treatments such as injection of drug or substance under skin or into muscle and pneumococcal conjugate vaccine, 20 valent , for intramuscular use, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Grenz's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grenz. If this is you, claiming it is free.
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