Karen S. Tjaden, M.D.
Hospitalist Physician · Bismarck, ND
Karen S. Tjaden, M.D. is a hospitalist physician with a practice address in Bismarck, North Dakota, and NPI 1598768251, issued on May 24, 2005. Check the license (North Dakota 21598, as entered in NPPES) on the North Dakota Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Karen S. Tjaden
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 21598 ND
4904 SD
Self-reported in NPPES; status is on the state search - Practice location
- 300 N 7TH St, Bismarck, ND 58501
- Phone
- (701) 323-6000
- Enumerated
- May 24, 2005
- Record last updated
- Nov 8, 2024
- Medicare enrollment
- Enrolled (PECOS I20241113002051); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 138 in North Dakota → Look up another NPI →
Also registered at 300 N 7TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ayden ArnoldSpeech-Language Pathologist1275411613
- Mubashir Badar, M.D.Hospitalist Physician1992041123
Verify Karen S. Tjaden in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Dakota Board of Medicine
Search for license 21598Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
45% fewer Medicare Part D claims than the average hospitalist physician in 2024
286 Medicare Part D claims for 101 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Nebivolol Hcl19 claims
- Atorvastatin Calcium17 claims
- Metoprolol Succinate12 claims
- Amlodipine Besylate11 claims
- Eliquis11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Monument Health Rapid City Hospital IncRapid City, SD
- Sanford BismarckBismarck, ND
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen S. Tjaden among 138 hospitalist physician records in North Dakota
Karen S. Tjaden, M.D. is one of 138 hospitalist physician records with a practice address in North Dakota. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 98% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 89% of these records are
- Graduated1998 · median 2012 among the 122 with a school on file
- Record last updated2024 · 22% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a North Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in North Dakota
There are 138 hospitalist physician records in North Dakota.
All 138 in North Dakota → Every provider in Bismarck → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Sumit Bhandari, MDBismarck, ND 585011336452572
- Maria Castejon Welchez, M.D.Bismarck, ND 585011033396437
- Lawrence Dasilva, MDBismarck, ND 585011750300612
- Renato Delos Santos, MDBismarck, ND 585011457635559
- J'Patrick Fahn, D.O.Bismarck, ND 585011902818933
- Amir Kichloo, M.D.Bismarck, ND 585011194978734
- Johanes Prawira, MDBismarck, ND 585011932337706
- Eric Ragland, M.D.Bismarck, ND 585011912273418
Common questions
What is Karen S. Tjaden, M.D.'s NPI number?
Karen S. Tjaden, M.D.'s National Provider Identifier (NPI) is 1598768251, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karen S. Tjaden, M.D. located?
The NPPES record lists a practice address at 300 N 7TH St, Bismarck, ND, 58501. Phone: (701) 323-6000. Providers update this record themselves, so call before visiting.
How can I verify Karen S. Tjaden, M.D.'s license?
NPPES lists North Dakota license number 21598, as entered by the provider. Search the North Dakota Board of Medicine at https://www.ndbom.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karen S. Tjaden, M.D. prescribe under Medicare Part D?
In 2024, Karen S. Tjaden, M.D. had 286 Medicare Part D claims for 101 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Karen S. Tjaden, M.D.'s MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.