Son G. Lam, MD
NPI 1407866650ActiveIndividual· Internal Medicine, Nephrology· Oxford, MS
Internal Medicine, Nephrology (MD) in Oxford, Mississippi, trained at University of Mississippi School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $461,837 for 1,492 claims, against $232,312 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 16 companies reporting payments in 2025, $956.39 in all, mostly food and beverage.
Overview
| NPI | 1407866650 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 9, 2006 |
| Last updated in NPPES | Mar 16, 2023 |
| Certified by provider | Mar 16, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 19369 | MS |
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 - Nephrology (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 526 |
|---|---|
| Services billed | 3,031 across 27 procedure codes |
| Paid by Medicare | $232,312 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,492 · 2,666 30-day fills |
|---|---|
| Patients | 279 |
| Total drug cost | $461,837 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Nephrology and Hypertension Associates LtdTupelo, MS · 19 clinicians
Hospital affiliations
- Baptist Memorial Hospital North MsOxford, MS
- Baptist Memorial Hospital Union CountyNew Albany, MS
- Greenwood Leflore HospitalGreenwood, MS
- North Mississippi Medical CenterTupelo, MS
- University of Mississippi Medical Center- GrenadaGrenada, MS
Other facilities
- Rcg GrenadaDialysis facility · Grenada, MS
- Rcg Oxford (Yokna River)Dialysis facility · Oxford, MS
- Rcg Oxford Home TherapyDialysis facility · Oxford, MS
Industry payments (Open Payments)
- 2025$956.39 · 45 payments from 16 companies
- 2024$1,227 · 61 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $155.61 | 8 |
| Novartis Pharmaceuticals Corporation | $139.12 | 5 |
| Otsuka America Pharmaceutical, Inc. | $137.38 | 6 |
| Travere Therapeutics, Inc. | $119.72 | 8 |
| Calliditas Therapeutics US Inc. | $52.91 | 2 |
What the 2025 payments were for
- Food and Beverage$951.41 · 42 payments
- Education$4.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Nephrology providers in Mississippi →