Dr. Mark Clinton Nielsen, DDS
Dr. Mark Clinton Nielsen is a Dentist provider (Dentist) practicing in Pierre, SD, registered in the NPPES registry with NPI 1013135581 since 2007. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1013135581 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark Clinton Nielsen |
| Credential | DDS |
| Sex | Male |
| Practice address | 465 S PIERRE STREET, Pierre, SD, 57501 |
| Phone | 6052247774 |
| Fax | 6052249171 |
| Enumeration date | 2007-04-23 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 122300000X | Dentist | Primary | M607 | SD |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 7804160 | Medicaid | SD | — |
Copy-ready billing details
Provider: Mark Nielsen, DDS NPI: 1013135581 Taxonomy: 122300000X (Dentist) Address: 465 S PIERRE STREET, Pierre, SD, 57501
Verify this record
Cross-check NPI 1013135581 against the authoritative CMS record: view Dr. Mark Clinton Nielsen 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.
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.