Mary Tahnk-Johnson
NPI 1548247547 · Nephrology Physician · St Louis Park, MN
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Tahnk-Johnson is a Nephrology Physician provider in St Louis Park, MN (NPI 1548247547).
Provider details
- NPI number
- 1548247547
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 32922 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
856 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 177 | $9 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 98 | $336 |
| Kidney Function Blood Test Panel80069 | 94 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 91 | $123 |
| Blood Count, Hemoglobin85018 | 66 | $2 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 172 | 56 |
| Losartan Potassium | 124 | 38 |
| Lisinopril | 87 | 30 |
| Furosemide | 87 | 27 |
| Spironolactone | 81 | 23 |
| Metoprolol Succinate | 80 | 23 |
| Allopurinol | 68 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-30
- Last updated
- 2011-10-12
Frequently asked questions
- What is Mary Tahnk-Johnson's NPI number?
- Mary Tahnk-Johnson's National Provider Identifier (NPI) is 1548247547, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Tahnk-Johnson's specialty?
- Mary Tahnk-Johnson is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Tahnk-Johnson located?
- Mary Tahnk-Johnson's practice location on file with NPPES is 6490 Excelsior Blvd, St Louis Park, MN 55426-4705.
- What is Mary Tahnk-Johnson's phone number?
- The practice phone number listed in the NPPES registry for Mary Tahnk-Johnson is (952) 993-4705.
- Does Mary Tahnk-Johnson accept Medicare?
- Mary Tahnk-Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Tahnk-Johnson's NPI active?
- Yes — Mary Tahnk-Johnson's NPI (1548247547) is active in the NPPES registry as of the last update on 2011-10-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.