East River Psychological Services
East River Psychological Services is a healthcare organization registered as Clinical Psychologist in Mitchell, SD, holding Type 2 (organization) NPI 1598487308 since 2022. The authorized official on file is Matthew Christiansen, Clinical Psychologist/Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1598487308 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | East River Psychological Services |
| Practice address | 3413 N OHLMAN ST, Mitchell, SD, 57301 |
| Phone | 6059990728 |
| Enumeration date | 2022-09-19 |
| Last updated in NPPES | 2024-09-06 |
Authorized official
| Name | Matthew Christiansen |
|---|---|
| Title | Clinical Psychologist/Owner |
| Phone | 6056307387 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Primary | — | — |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1639136088 | Medicaid | SD | — |
Copy-ready billing details
Provider: East River Psychological Services NPI: 1598487308 Taxonomy: 103TC0700X (Clinical Psychologist) Address: 3413 N OHLMAN ST, Mitchell, SD, 57301
Verify this record
Cross-check NPI 1598487308 against the authoritative CMS record: view East River Psychological Services 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
Where is East River Psychological Services located?
How current is this record?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2024-09-06.