Ravishankar Kalaga, M.D.
Ravishankar Kalaga, M.D. is an Interventional Cardiology Physician in Watertown, SD, registered under NPI 1174685515. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 401 9TH AVE NW, Watertown, SD 57201. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 9527 | SD | Interventional Cardiology Physician primary |
| 22045 | NE | Cardiovascular Disease Physician |
| 22045 | NE | Interventional Cardiology Physician |
| E-9510 | AR | Interventional Cardiology Physician |
| 9527 | SD | Vascular Surgery Physician |
Licences are recorded in 3 states: SD, NE, AR. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Interventional Cardiology
- PAC ID
- 5597709014
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Wisconsin | I20170214001474 | Practitioner - Interventional Cardiology |
| South Dakota | I20220715002194 | Practitioner - Cardiovascular Disease (cardiology) |
Medicare enrolment is recorded as approved under the provider type Practitioner - Interventional Cardiology. There are 2 separate enrolment records across 2 states (WI, SD). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 3 states
This provider holds licences in 3 states: Arkansas, Nebraska and South Dakota. The practice address on file is in Watertown, SD, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- 9527
- Specialty
- Interventional Cardiology Physician
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Interventional Cardiology covers
An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system. NUCC Health Care Provider Taxonomy, code 207RI0011X
All registered taxonomy codes
This provider registers 5 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207RI0011X | Interventional Cardiology Physician Interventional Cardiology | 9527 | SD | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 22045 | NE | |
| 207RI0011X | Interventional Cardiology Physician Interventional Cardiology | 22045 | NE | |
| 207RI0011X | Interventional Cardiology Physician Interventional Cardiology | E-9510 | AR | |
| 2086S0129X | Vascular Surgery Physician Vascular Surgery | 9527 | SD |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1174685515 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 14, 2006 |
| Last updated | Jan 22, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
401 9TH AVE NW Watertown, SD 57201 (605) 882-7000 Fax (605) 882-7607 |
| Mailing address |
PO BOX 1210 Watertown, SD 57201 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 7 | 4 | 6 | 8 | 5 | 5 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 5 | 4 | 3 | 8 | 1 | 5 | 2 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.