Matthew Christiansen, PHD
NPI 1639136088 · Clinical Psychologist · Mitchell, SD
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Christiansen, PHD is a Clinical Psychologist provider in Mitchell, SD (NPI 1639136088).
Provider details
- NPI number
- 1639136088
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 488 (SD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 3413 N Ohlman StMitchell, SD 57301-5052Phone: (605) 299-2829
Registry dates
- Enumerated
- 2006-04-28
- Last updated
- 2024-09-08
- Certified
- 2024-09-08
Frequently asked questions
- What is Matthew Christiansen's NPI number?
- Matthew Christiansen's National Provider Identifier (NPI) is 1639136088, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Christiansen's specialty?
- Matthew Christiansen is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Matthew Christiansen located?
- Matthew Christiansen's practice location on file with NPPES is 115 E Havens Ave Ste 102, Mitchell, SD 57301-4462.
- What is Matthew Christiansen's phone number?
- The practice phone number listed in the NPPES registry for Matthew Christiansen is (605) 299-2829.
- Does Matthew Christiansen accept Medicare?
- Matthew Christiansen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Christiansen's NPI active?
- Yes — Matthew Christiansen's NPI (1639136088) is active in the NPPES registry as of the last update on 2024-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.