Dr. John M Grunseth, DDS
Dr. John M Grunseth is a Dentist provider (Dentist) practicing in Mandan, ND, registered in the NPPES registry with NPI 1821133026 since 2007. The credential DDS stands for Doctor of Dental Surgery. Practices at Dental Associates Inc (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1821133026 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John M Grunseth |
| Credential | DDS |
| Sex | Male |
| Practice address | 204 3RD AVE NW, Mandan, ND, 58554 |
| Phone | 7016637545 |
| Fax | 7016636174 |
| Enumeration date | 2007-02-21 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 122300000X | Dentist | Primary | 1456 | ND |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: John Grunseth, DDS NPI: 1821133026 Taxonomy: 122300000X (Dentist) Address: 204 3RD AVE NW, Mandan, ND, 58554
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1700921913 | Dental Associates Inc | Organization | Dentist | Mandan, ND |
| 1093931990 | Anthony Malaktaris | Individual | General Practice Dentistry | Mandan, ND |
| 1740473834 | Thomas Lengowski | Individual | Dentist | Mandan, ND |
| 1497981435 | Nicole Duckwitz | Individual | Dentist | Mandan, ND |
| 1962797134 | Michael Maier | Individual | Dentist | Mandan, ND |
| 1578211728 | Brady Zittleman | Individual | General Practice Dentistry | Mandan, ND |
Verify this record
Cross-check NPI 1821133026 against the authoritative CMS record: view Dr. John M Grunseth on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.