Siva Kumar Chockalingam, MD
NPI 1356300792ActiveIndividual· Internal Medicine, Gastroenterology· Columbia, SC
Internal Medicine, Gastroenterology (MD) with Associates in Gastroenterology PA, practicing in Columbia, South Carolina. Their prescriptions cost Medicare Part D more than their services did: $304,610 for 1,886 claims, against $160,873 paid for services in 2024. Pfizer Inc. reported $31.00 in payments in 2025, mostly education. Lists Kershawhealth and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1356300792 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 23, 2006 |
| Last updated in NPPES | Dec 19, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 71671 | SC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 425 |
|---|---|
| Services billed | 1,771 across 22 procedure codes |
| Paid by Medicare | $160,873 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,886 · 3,503 30-day fills |
|---|---|
| Patients | 347 |
| Total drug cost | $304,610 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Associates in Gastroenterology PAColumbia, SC · 2 clinicians
Hospital affiliations
- KershawhealthCamden, SC
- Lexington Medical CenterWest Columbia, SC
- Musc Health Columbia Medical Center DowntownColumbia, SC
- Prisma Health BaptistColumbia, SC
- Prisma Health Richland HospitalColumbia, SC
Industry payments (Open Payments)
- 2025$31.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $31.00 | 1 |
What the 2025 payments were for
- Education$31.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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