William Witmer, MD
NPI 1033130653 · Interventional Cardiology Physician · Green Bay, WI
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Witmer, MD is a Interventional Cardiology Physician provider in Green Bay, WI (NPI 1033130653).
Provider details
- NPI number
- 1033130653
- Entity type
- Individual
- Primary specialty
- Interventional Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30867 (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
1,597 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) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 478 | $63 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 464 | $7 |
| Ultrasound of Heart, Follow-Up93308 | 129 | $22 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate and Valve Function93325 | 86 | $3 |
| Ultrasound of Heart Blood Flow, Valves and Chambers, Follow-Up93321 | 84 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 353 | 109 |
| Rosuvastatin Calcium | 329 | 105 |
| Atorvastatin Calcium | 317 | 89 |
| Losartan Potassium | 155 | 53 |
| Carvedilol | 144 | 42 |
| Apixabanbrand: Eliquis | 128 | 35 |
| Furosemide | 109 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-21
- Last updated
- 2008-09-30
Frequently asked questions
- What is William Witmer's NPI number?
- William Witmer's National Provider Identifier (NPI) is 1033130653, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Witmer's specialty?
- William Witmer is listed in the NPPES registry with a primary specialty of Interventional Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Witmer located?
- William Witmer's practice location on file with NPPES is 2845 Greenbrier Rd Ste 310, Green Bay, WI 54311-6519.
- What is William Witmer's phone number?
- The practice phone number listed in the NPPES registry for William Witmer is (920) 288-8300.
- Does William Witmer accept Medicare?
- William Witmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Witmer's NPI active?
- Yes — William Witmer's NPI (1033130653) is active in the NPPES registry as of the last update on 2008-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.