Ravishankar V. Kalaga, M.D.
NPI 1174685515ActiveIndividual· Internal Medicine, Interventional Cardiology· Watertown, SD
Internal Medicine, Interventional Cardiology (M.D.) with Prairie Lakes Health Care System Inc, practicing in Watertown, South Dakota. Their prescriptions cost Medicare Part D more than their services did: $145,004 for 1,430 claims, against $80,977 paid for services in 2024. Zoll Services LLC (A/K/A Zoll Lifecor Corp) was the largest of 15 companies reporting payments in 2025, $887.49 in all, mostly food and beverage. Lists Prairie Lakes Healthcare System, Inc and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1174685515 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 14, 2006 |
| Last updated in NPPES | Jan 22, 2025 |
| Certified by provider | Jan 22, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | 9527 | SD |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 22045 | NE |
| Internal Medicine, Interventional Cardiology | 207RI0011X | 22045 | NE |
| Internal Medicine, Interventional Cardiology | 207RI0011X | E-9510 | AR |
| Surgery, Vascular Surgery | 2086S0129X | 9527 | SD |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (SD); Practitioner - Interventional Cardiology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 558 |
|---|---|
| Services billed | 1,219 across 57 procedure codes |
| Paid by Medicare | $80,977 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,430 · 2,517 30-day fills |
|---|---|
| Patients | 264 |
| Total drug cost | $145,004 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Prairie Lakes Health Care System IncWatertown, SD · 109 clinicians
Hospital affiliations
- Prairie Lakes Healthcare System, IncWatertown, SD
- Sanford Hospital Webster - CahWebster, SD
- Sanford Usd Medical CenterSioux Falls, SD
Industry payments (Open Payments)
- 2025$887.49 · 43 payments from 15 companies
- 2024$753.08 · 38 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $211.16 | 11 |
| Abbott Laboratories | $202.75 | 10 |
| Medtronic, Inc. | $170.18 | 8 |
| Alnylam Pharmaceuticals Inc. | $38.28 | 2 |
| Becton, Dickinson and Company | $38.04 | 1 |
What the 2025 payments were for
- Food and Beverage$887.49 · 43 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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