Som Nath Chalise, M.D.
NPI 1255580361ActiveIndividual· Internal Medicine, Pulmonary Disease· Newport News, VA
Internal Medicine, Pulmonary Disease (M.D.) with Riverside Physician Services Inc, practicing in Newport News, Virginia. Their prescriptions cost Medicare Part D more than their services did: $1,167,650 for 1,189 claims, against $63,138 paid for services in 2024. Merck Sharp & Dohme LLC reported $21.13 in payments in 2025, mostly food and beverage. Lists Riverside Doctors' Hospital of Williamsburg and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1255580361 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 12, 2008 |
| Last updated in NPPES | Aug 28, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 0101266927 | VA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 201487 | NC |
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 - Pulmonary Disease (NC); Practitioner - Pulmonary Disease (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 393 |
|---|---|
| Services billed | 1,136 across 44 procedure codes |
| Paid by Medicare | $63,138 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,189 · 1,500 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $1,167,650 |
| Generic share | 30% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
Medical group
- Riverside Physician Services IncWilliamsburg, VA · 797 clinicians
Hospital affiliations
- Riverside Doctors' Hospital of WilliamsburgWilliamsburg, VA
- Riverside Regional Medical CenterNewport News, VA
- Riverside Shore Memorial HospitalOnancock, VA
- Riverside Walter Reed HospitalGloucester, VA
Industry payments (Open Payments)
- 2025$21.13 · 1 payment from 1 company
- 2024$1,529 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $21.13 | 1 |
What the 2025 payments were for
- Food and Beverage$21.13 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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