Mark N. Klein, MD
NPI 1376628529ActiveIndividual· Internal Medicine, Nephrology· Flowood, MS
Internal Medicine, Nephrology (MD) in Flowood, Mississippi, trained at University of Mississippi School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $437,529 for 1,796 claims, against $181,428 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 9 companies reporting payments in 2025, $300.31 in all, mostly food and beverage.
Overview
| NPI | 1376628529 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 26, 2006 |
| Last updated in NPPES | May 19, 2026 |
| Certified by provider | May 19, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 15985 | MS |
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 - Nephrology (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 471 |
|---|---|
| Services billed | 2,115 across 42 procedure codes |
| Paid by Medicare | $181,428 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,796 · 3,443 30-day fills |
|---|---|
| Patients | 198 |
| Total drug cost | $437,529 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Nephrology |
Medical group
- Central Nephrology Clinic PLLCFlowood, MS · 17 clinicians
Hospital affiliations
- Magee General HospitalMagee, MS
- Mississippi Baptist Medical CenterJackson, MS
- St Dominic-Jackson Memorial HospitalJackson, MS
Other facilities
- Fkc DogwoodDialysis facility · Flowood, MS
- Fmc Dialysis Services of Rankin CountyDialysis facility · Brandon, MS
- Fmc Lakeland Home ProgramDialysis facility · Flowood, MS
- Fmc MageeDialysis facility · Magee, MS
Industry payments (Open Payments)
- 2025$300.31 · 16 payments from 9 companies
- 2024$486.98 · 21 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $77.41 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $59.98 | 3 |
| Astrazeneca Pharmaceuticals LP | $51.90 | 3 |
| Aurinia Pharma U.S., Inc. | $39.32 | 2 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | $20.48 | 1 |
What the 2025 payments were for
- Food and Beverage$282.62 · 14 payments
- Education$17.69 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Nephrology providers in Flowood
- 1942576277
- 1528109972
- 1134339286
- 1942813506
- 1194809822
- 1114239423
- 1306166970
- 1326123423
- 1871678029
- 1093883662
- 1164685640
- 1063597227
All Internal Medicine, Nephrology providers in Mississippi →