Mark Robert Keaton, M.D.
NPI 1477530533ActiveIndividual· Internal Medicine, Hematology & Oncology· Florence, SC
Internal Medicine, Hematology & Oncology (M.D.) in Florence, South Carolina, trained at Medical College of Georgia School of Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $298,308 for 99 claims, against $1,847 paid for services in 2024. Daiichi Sankyo Inc. was the largest of 2 companies reporting payments in 2025, $925.00 in all, mostly consulting fees.
Overview
| NPI | 1477530533 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 29, 2005 |
| Last updated in NPPES | Jan 25, 2022 |
| Certified by provider | Jan 25, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 51420 | SC |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 028423 | GA |
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 - Hematology/Oncology (GA); Practitioner - Hematology/Oncology (HI); Practitioner - Hematology/Oncology (MT); Practitioner - Hematology/Oncology (SC); Practitioner - Medical Oncology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 27 |
|---|---|
| Services billed | 28 across 5 procedure codes |
| Paid by Medicare | $1,847 |
Part D prescriptions in 2024
| Prescriptions (claims) | 99 · 121 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $298,308 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Medical College of Georgia School of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
Medical groups
- McHs Hospitals IncMarshfield, WI · 1,197 clinicians
- Kauai Medical ClinicLihue, HI · 147 clinicians
Hospital affiliations
- Marshfield Medical Center - MinocquaMinocqua, WI
- Wilcox Memorial HospitalLihue, HI
Industry payments (Open Payments)
- 2025$925.00 · 2 payments from 2 companies
- 2024$9,432 · 13 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Daiichi Sankyo Inc. | $650.00 | 1 |
| Cardinal Health 110 LLC | $275.00 | 1 |
What the 2025 payments were for
- Consulting Fee$925.00 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Hematology & Oncology providers in South Carolina →