Dr. Sumit N. Ringwala, M.D.
Interventional Cardiology (Interventional Cardiology Physician)
- Medicare participating
At a glance
- Medical school
- University of Wisconsin School of Medicine (2000)
- Years since graduation
- 26
- In the NPI registry since
- 2007
- Medicare patients seen, 2024
- 615
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2000Medical school: University of Wisconsin School of Medicine
- 2007Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Interventional Cardiology Physician primary
WI license 502530-020 -
Cardiovascular Disease Physician
WI license 5025320 -
Internal Medicine Physician
WI license 5025320
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Bellin Memorial Hospital Green Bay, WI
- Osf St Francis Hospital and Medical Group Escanaba, MI
- Bellin Health Oconto Hospital Oconto, WI
Medical groups
- Osf Multi-Specialty Group (2,114 clinicians)
- Bellin Memorial Hospital Inc (697 clinicians)
- St Francis Hospital (86 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 615
- Services billed
- 1,075
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 288 | 247 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 109 | 109 |
| Established patient office or other outpatient visit, 30-39 minutes | 90 | 76 |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 74 | 67 |
| Nuclear medicine studies of heart muscle at rest and with stress and spect | 67 | 67 |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | 58 | 58 |
| New patient office or other outpatient visit, 45-59 minutes | 39 | 39 |
| Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist | 34 | 34 |
| Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch | 32 | 27 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 31 | 18 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 6 companies reported 16 payments worth $4,291 in total to this clinician.
| Stryker Corporation | $3,240 |
|---|---|
| Boston Scientific Corporation | $972 |
| Surmodics, Inc. | $25.52 |
| AstraZeneca Pharmaceuticals LP | $22.08 |
| Inari Medical, Inc. | $17.32 |
| W. L. Gore & Associates, Inc. | $14.18 |
| Consulting Fee | $3,150 |
|---|---|
| Travel and Lodging | $735 |
| Food and Beverage | $406 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Stryker Corporation Oct 22, 2025 | Consulting Fee FLOWTRIEVER CATHETER, S; CT THROMBECTOMY SYSTEM KIT · VTE | $3,150 |
| Boston Scientific Corporation Nov 11, 2025 | Travel and Lodging General - Vascular Access · General - Vascular Access_IC · travel to Kansas City, MO · in-kind | $255 |
| Boston Scientific Corporation Nov 12, 2025 | Travel and Lodging General - Vascular Access · General - Vascular Access_IC · travel to Kansas City, MO · in-kind | $229 |
| Boston Scientific Corporation Nov 11, 2025 | Travel and Lodging General - Vascular Access · General - Vascular Access_IC · travel to Kansas City, MO · in-kind | $229 |
| Stryker Corporation Oct 22, 2025 | Travel and Lodging CT THROMBECTOMY SYSTEM KIT; FLOWTRIEVER CATHETER, S · VTE · travel to DEPERE, WI | $21.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $31,262 in research payments for these studies, mostly to the institutions running them.
- AGILITY
Bard Peripheral Vascular, Inc.
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.