Thomas A. Neef, M.D.
NPI 1568550309ActiveIndividual· Internal Medicine· Wilmington, DE
Internal Medicine (M.D.) in Wilmington, Delaware, trained at Georgetown University School of Medicine (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $439,130 for 5,408 claims, against $120,593 paid for services in 2024.
Overview
| NPI | 1568550309 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 10, 2006 |
| Last updated in NPPES | Feb 24, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C1-1941 | DE |
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 (DE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 276 |
|---|---|
| Services billed | 1,701 across 25 procedure codes |
| Paid by Medicare | $120,593 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,408 · 13,005 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $439,130 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliation
- Christiana HospitalNewark, DE
Other facilities
- Amedisys Delaware, LLCHome health agency · Dover, DE
- Bayada Home Health Care, IncHome health agency · Wilmington, DE
- Christianacare HomehealthHome health agency · Wilmington, DE
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 156 internal medicine physicians in Wilmington · All internal medicine physicians in Delaware