Mark Gideonsen, MD
NPI 1841236445 · Family Medicine Physician · Eau Claire, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gideonsen, MD is a Family Medicine Physician provider in Eau Claire, WI (NPI 1841236445).
Provider details
- NPI number
- 1841236445
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 44761 (WI)
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
177 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 50 | $88 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 39 | $9 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 22 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $123 |
| Hemoglobin A1c Level83036 | 17 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 100 | 30 |
| Levothyroxine Sodium | 94 | 20 |
| Lisinopril | 72 | 20 |
| Metoprolol Succinate | 71 | 14 |
| Metformin Hcl | 68 | 19 |
| Hydrochlorothiazide | 62 | 11 |
| Omeprazole | 49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-21
- Last updated
- 2024-08-27
- Certified
- 2024-08-27
Frequently asked questions
- What is Mark Gideonsen's NPI number?
- Mark Gideonsen's National Provider Identifier (NPI) is 1841236445, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gideonsen's specialty?
- Mark Gideonsen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gideonsen located?
- Mark Gideonsen's practice location on file with NPPES is 1002 W Clairemont Ave, Eau Claire, WI 54701-6123.
- What is Mark Gideonsen's phone number?
- The practice phone number listed in the NPPES registry for Mark Gideonsen is (534) 200-6165.
- Does Mark Gideonsen accept Medicare?
- Mark Gideonsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gideonsen's NPI active?
- Yes — Mark Gideonsen's NPI (1841236445) is active in the NPPES registry as of the last update on 2024-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.