KAREN S TJADEN M.D.
NPI 1598768251
Hospitalist in Bismarck, ND
About Karen S Tjaden M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN S TJADEN M.D. (NPI 1598768251) is an individual hospitalist provider in Bismarck, North Dakota, licensed in North Dakota (21598) and active in the NPI registry since May 2005. She is enrolled in Medicare PECOS, is affiliated with Sanford Medical Center Bismarck, and maintains a secondary practice location in Deadwood.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Karen S Tjaden M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Karen Tjaden reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bismarck, ND 58504
- Reassigned Medicare billing, North Dakota enrollment
- 779 clinicians in this Medicare group
Buffalo, SD 57720
- Reassigned Medicare billing, South Dakota enrollment
- 321 clinicians in this Medicare group
Wall, SD 57790
- Reassigned Medicare billing, South Dakota enrollment
- 831 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Sanford Medical Center Bismarck
Acute Care Hospitals · Bismarck, NDMonument Health Rapid City Hospital
Acute Care Hospitals · Rapid City, SDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 58501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Karen Tjaden's NPI number?
The NPI number for Karen Tjaden is 1598768251. It was assigned to this individual provider in the NPPES registry on May 24, 2005.
Where is Karen Tjaden located?
Karen Tjaden practices at 300 N 7th St, Bismarck, ND 58501. The listed phone number is (701) 323-6000.
What is Karen Tjaden's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Karen Tjaden enrolled in Medicare?
Yes. Karen Tjaden is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Karen Tjaden's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Tjaden reassigns Medicare benefits to 3 organizations: Sanford Bismarck (Bismarck, ND), Monument Health Network, Inc. (Buffalo, SD) and Monument Health Rapid City Hospital, Inc. (Wall, SD). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karen Tjaden's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Tjaden accept?
Health plans from Avera Health Plans, Blue Cross Blue Shield of North Dakota, Sanford Health Plan, Security Health Plan and Wellmark of South Dakota, Inc. list Karen Tjaden as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Karen Tjaden affiliated with any hospitals?
According to CMS data, Karen Tjaden is affiliated with Sanford Medical Center Bismarck and Monument Health Rapid City Hospital.
When was this NPI record last updated?
The NPPES record for Karen Tjaden was last updated on November 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Karen S Tjaden, M.D. · NPI 1598768251
Hospitalist physician in Bismarck, North Dakota. Individual provider, active in the CMS NPPES registry since May 24, 2005.
## Identity
- **NPI:** 1598768251 (Entity type: Individual)
- **Enumerated:** May 24, 2005
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 21598 (North Dakota)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 N 7TH ST, Bismarck, ND 58501-4439
- **Phone:** (701) 323-6000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Sanford Bismarck (NPI 1811941172, Bismarck, ND); Monument Health Network, Inc. (NPI 1073992004, Buffalo, SD); Monument Health Rapid City Hospital, Inc. (NPI 1265811285, Wall, SD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1998
## Record status
- **NPPES last updated:** November 8, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1598768251) · Data from the CMS NPPES public registry.