Steven Sonnamaker, MD
Steven Sonnamaker, MD is an Emergency Medicine Physician in Bismarck, ND, registered under NPI 1003345323.
Getting there
Here is what surrounds this office in Bismarck, based on OpenStreetMap data collected Sep 11, 2026. Parking is available about 898 ft away.
Getting here and what is nearby
Parking 212 ft ~1 min
Hotel Radisson Hotel Bismarck 540 ft ~3 min
Parking 646 ft ~3 min
Restaurant Jimmy V's 802 ft ~4 min
512 East Main Avenue, Bismarck 58501
Mo-Fr 11:00-01:00; Sa-Su 10:00-01:00
Restaurant Fireflour Pizza 807 ft ~4 min
Parking 898 ft ~4 min
Restaurant McDonald's 894 ft ~4 min
605 East Main Avenue, Bismarck 58501
05:00-23:00; Fr,Sa 05:00-24:00
Convenience Kum & Go 0.30 mi ~7 min
Gas station Kum & Go 0.31 mi ~7 min
Convenience Simonson Station Stores 0.33 mi ~7 min
1011 East Main Avenue, Bismarck 58501
Gas station Simonson Station Stores 0.33 mi ~7 min
1011 East Main Avenue, Bismarck 58501
Grocery BisMan Community Food Co-op 0.34 mi ~7 min
711 East Sweet Avenue, Bismarck 58504
Mo-Sa 08:00-20:00; Su 10:00-18:00
Convenience Asian Gourmet Market 0.38 mi ~8 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 16394 | ND | Emergency Medicine Physician primary |
| 4301112415 | MI | Emergency Medicine Physician |
Licences are recorded in 2 states: ND, MI. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Emergency Medicine
- PAC ID
- 4688942667
- Enrollment ID
- I20200520002068
Medicare enrolment is recorded as approved under the provider type Practitioner - Emergency Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: Michigan and North Dakota. The practice address on file is in Bismarck, ND, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 16394
- Specialty
- Emergency Medicine Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Emergency Medicine covers
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury. NUCC Health Care Provider Taxonomy, code 207P00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207P00000X | Emergency Medicine Physician | 16394 | ND | primary |
| 207P00000X | Emergency Medicine Physician | 4301112415 | MI |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003345323 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 9, 2017 |
| Last updated | May 3, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
300 N 7TH ST Bismarck, ND 58501 (701) 323-6000 |
| Mailing address |
PO BOX 5074 Sioux Falls, SD 57117 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 4 | 5 | 3 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 4 | 1 | 3 | 4 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.