Dr. Matthew D Christiansen, PHD
Dr. Matthew D Christiansen is a Clinical Psychologist provider (Psychologist) practicing in Mitchell, SD, registered in the NPPES registry with NPI 1639136088 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1639136088 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Matthew D Christiansen |
| Credential | PHD |
| Sex | Male |
| Practice address | 115 E HAVENS AVE STE 102, Mitchell, SD, 57301 |
| Phone | 6052992829 |
| Enumeration date | 2006-04-28 |
| Last updated in NPPES | 2024-09-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | 488 | SD |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| SD449 | Other | SD | DAKOTACARE |
| 33171 | Other | SD | SIOUX VALLEY HEALTH |
| 91400318 | Medicaid | SD | — |
| 9189 | Other | SD | AVERA HEALTH |
| 4995782 | Other | SD | WELLMARK BC BS |
Copy-ready billing details
Provider: Matthew Christiansen, PHD NPI: 1639136088 Taxonomy: 103TC0700X (Clinical Psychologist) Address: 115 E HAVENS AVE STE 102, Mitchell, SD, 57301
Verify this record
Cross-check NPI 1639136088 against the authoritative CMS record: view Dr. Matthew D Christiansen 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 2024-09-08.