Opkar S. Chawla, MD
NPI 1871548776ActiveIndividual· Internal Medicine· Centereach, NY
Internal Medicine (MD) with Stony Brook Internists University Faculty Practice Corporation, practicing in Centereach, New York. Their prescriptions cost Medicare Part D more than their services did: $1,016,739 for 7,591 claims, against $132,550 paid for services in 2024. Lilly USA, LLC was the largest of 20 companies reporting payments in 2025, $1,539 in all, mostly food and beverage. Lists Suny/Stony Brook University Hospital as a hospital affiliation.
Overview
| NPI | 1871548776 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 23, 2006 |
| Last updated in NPPES | Aug 10, 2023 |
| Certified by provider | Aug 10, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 183894 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 334 |
|---|---|
| Services billed | 1,617 across 32 procedure codes |
| Paid by Medicare | $132,550 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,591 · 17,077 30-day fills |
|---|---|
| Patients | 548 |
| Total drug cost | $1,016,739 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Stony Brook Internists University Faculty Practice CorporationStony Brook, NY · 428 clinicians
Hospital affiliation
- Suny/Stony Brook University HospitalStony Brook, NY
Other facilities
- Catholic Home CareHome health agency · Farmingdale, NY
- Centerwell Home HealthHome health agency · Hauppauge, NY
- Constellation Home CareHome health agency · Syosset, NY
- Tender Loving Care, An Amedisys CompanyHome health agency · Medford, NY
Industry payments (Open Payments)
- 2025$1,539 · 68 payments from 20 companies
- 2024$1,885 · 72 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $280.86 | 8 |
| Pfizer Inc. | $211.22 | 11 |
| Astrazeneca Pharmaceuticals LP | $202.93 | 13 |
| Amgen Inc. | $99.85 | 4 |
| Astellas Pharma US Inc | $98.45 | 4 |
What the 2025 payments were for
- Food and Beverage$1,539 · 68 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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