Mary Tahnk-Johnson
Nephrology Physician · St Louis Park, MN
Mary Tahnk-Johnson is a nephrology physician with a practice address in St Louis Park, Minnesota, and NPI 1548247547, issued on Dec 30, 2005. Check the license (Minnesota 32922, as entered in NPPES) on the Minnesota Board of Medical Practice; the Medicare figures below come from public CMS files.
- Name
- Mary Tahnk-Johnson
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 32922 MN
Self-reported in NPPES; status is on the state search - Practice location
- 6490 Excelsior Blvd, St Louis Park, MN 55426
- Phone
- (952) 993-4705
- Enumerated
- Dec 30, 2005
- Entity
- Type 1 · individual
Also registered at 6490 Excelsior Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrea Arvold, RDRegistered Dietitian1275779902
- Mary Baumgart, CNMAdvanced Practice Midwife1710964291
- Lisa Bolin, MDPulmonary Disease Physician1710964937
- Karen Carlsen, LGSWClinical Social Worker1487623674
- Susan Cleaveland, P.T.Physical Therapist1689741670
- John DavenportNeurology Physician1205810488
Verify Mary Tahnk-Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMinnesota Board of Medical Practice
Search for license 32922Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
16% more Medicare Part D claims than the average nephrology physician in 2024
1,749 Medicare Part D claims for 214 beneficiaries, against an average of 1,511 among the 8,473 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate172 claims
- Losartan Potassium124 claims
- Furosemide87 claims
- Lisinopril87 claims
- Spironolactone81 claims
- Metoprolol Succinate80 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.
One hospital or facility affiliation
- Park Nicollet ClinicChamplin, MN
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Nephrology Physician providers in Minnesota
There are 204 nephrology physician records in Minnesota.
Other nephrology physician records in Minnesota
- Mohammed Abdalla, MDRochester, MN1952823007
- Ahmed Abdalrhim, MBBSRochester, MN1679671762
- Paul Abraham, MDSt Paul, MN1477528438
- Amogh Agrawal, MDRochester, MN1992318406
- Aqeel Ahmad, M.D.Saint Paul, MN1497942866
- Momina Ahmed, MDMinneapolist, MN1790467116
- Sreyoshi Alam, MBBSRochester, MN1164031324
- Robert Albright, D.O.Rochester, MN1417934738
- Hatem Amer, MBBCHRochester, MN1417936634
- Lagu Androga, M.D.Rochester, MN1639532963
Common questions
What is Mary Tahnk-Johnson's NPI number?
Mary Tahnk-Johnson's National Provider Identifier (NPI) is 1548247547, issued on Dec 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Tahnk-Johnson located?
The NPPES record lists a practice address at 6490 Excelsior Blvd, St Louis Park, MN, 55426. Phone: (952) 993-4705. Providers update this record themselves, so call before visiting.
How can I verify Mary Tahnk-Johnson's license?
NPPES lists Minnesota license number 32922, as entered by the provider. Search the Minnesota Board of Medical Practice at https://mn.gov/boards/medical-practice/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Tahnk-Johnson prescribe under Medicare Part D?
In 2024, Mary Tahnk-Johnson had 1,749 Medicare Part D claims for 214 beneficiaries; the average among nephrology physician prescribers was 1,511. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.