Gretchen Johnsen, MD
NPI 1831150648 · Family Medicine Physician · Cottage Grove, MN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Johnsen, MD is a Family Medicine Physician provider in Cottage Grove, MN (NPI 1831150648).
Provider details
- NPI number
- 1831150648
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 30464 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 | 153 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 115 | $87 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 95 | $124 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 79 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 65 | $13 |
| Hemoglobin A1c Level83036 | 58 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 118 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 424 | 115 |
| Losartan Potassium | 283 | 80 |
| Lisinopril | 276 | 74 |
| Levothyroxine Sodium | 270 | 74 |
| Metoprolol Succinate | 201 | 59 |
| Amlodipine Besylate | 195 | 60 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-31
- Last updated
- 2011-10-20
Frequently asked questions
- What is Gretchen Johnsen's NPI number?
- Gretchen Johnsen's National Provider Identifier (NPI) is 1831150648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Johnsen's specialty?
- Gretchen Johnsen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gretchen Johnsen located?
- Gretchen Johnsen's practice location on file with NPPES is 8611 W Point Douglas Rd S, Cottage Grove, MN 55016-4005.
- What is Gretchen Johnsen's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Johnsen is (651) 458-1884.
- Does Gretchen Johnsen accept Medicare?
- Gretchen Johnsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Johnsen's NPI active?
- Yes — Gretchen Johnsen's NPI (1831150648) is active in the NPPES registry as of the last update on 2011-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.