Gary Vanoudenhoven, MD
NPI 1356451504 · Internal Medicine Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Vanoudenhoven, MD is a Internal Medicine Physician provider in Marshfield, WI (NPI 1356451504).
Provider details
- NPI number
- 1356451504
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 32162 (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
19 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
250 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 | 61 | $61 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 46 | $110 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 43 | $73 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $91 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 28 | $75 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 47 | 31 |
| Omeprazole | 29 | — |
| Losartan Potassium | 28 | 15 |
| Levothyroxine Sodium | 24 | 11 |
| Amlodipine Besylate | 21 | 13 |
| Lisinopril | 18 | 12 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-30
- Last updated
- 2024-02-16
- Certified
- 2024-02-16
Frequently asked questions
- What is Gary Vanoudenhoven's NPI number?
- Gary Vanoudenhoven's National Provider Identifier (NPI) is 1356451504, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Vanoudenhoven's specialty?
- Gary Vanoudenhoven is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Vanoudenhoven located?
- Gary Vanoudenhoven's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5703.
- What is Gary Vanoudenhoven's phone number?
- The practice phone number listed in the NPPES registry for Gary Vanoudenhoven is (715) 387-5511.
- Does Gary Vanoudenhoven accept Medicare?
- Gary Vanoudenhoven is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Vanoudenhoven's NPI active?
- Yes — Gary Vanoudenhoven's NPI (1356451504) is active in the NPPES registry as of the last update on 2024-02-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.