WILLIAM T WITMER (MD) – Interventional Cardiology Physician, NPI 1033130653
Interventional Cardiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
705 CARDIOVASCULAR DISEASE (CARDIOLOGY) in WI
Provider Addresses for WILLIAM T WITMER (MD)
2845 GREENBRIER RD STE 310
PO BOX 8900
GREEN BAY, WI 543088900
Phone: (920) 288-8300
Fax: (920) 288-8305
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-01-12
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050112000154 | I | Cardiovascular Disease (Cardiology) | WI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 648 | 449 | $0 |
| 93306 | Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 406 | 400 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 154 | 144 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 121 | 121 | $0 |
| 93308 | Ultrasound of heart, follow-up | 117 | 109 | $0 |
Insurance plans in this area (ZIP 54308)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Hospitalist, Internal Medicine | MI | |
| U R O L O G Y | WI | |
| N E U R O L O G Y | WI | |
| - | WI | |
| Cardiovascular Disease (Cardiology), Peripheral Vascular Disease | WI | |
| Nurse Practitioner | WI | |
| Internal Medicine | WI | |
| - | ME | |
| Physician Assistant | IL | |
| Hospice/Palliative Care, Internal Medicine | WI |
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