Chad Duffalo, M.D.
NPI 1639339484ActiveIndividual· Internal Medicine, Infectious Disease· Newark, DE
Internal Medicine, Infectious Disease (M.D.) in Newark, Delaware, trained at Temple University School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $780,287 for 670 claims, against $225,657 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 4 companies reporting payments in 2025, $194.55 in all, mostly food and beverage.
Overview
| NPI | 1639339484 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 16, 2008 |
| Last updated in NPPES | Feb 4, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 247974 | MA |
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 - Infectious Disease (DE); Practitioner - Infectious Disease (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 435 |
|---|---|
| Services billed | 9,832 across 23 procedure codes |
| Paid by Medicare | $225,657 |
Part D prescriptions in 2024
| Prescriptions (claims) | 670 · 758 30-day fills |
|---|---|
| Patients | 117 |
| Total drug cost | $780,287 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Infectious Disease Consultants PANewark, DE · 10 clinicians
Hospital affiliations
- Christiana HospitalNewark, DE
- St Francis HospitalWilmington, DE
- Union Hospital of Cecil CountyElkton, MD
Other facilities
- Christianacare HomehealthHome health agency · Wilmington, DE
Industry payments (Open Payments)
- 2025$194.55 · 9 payments from 4 companies
- 2024$446.05 · 18 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $59.74 | 2 |
| Insmed, Inc. | $59.36 | 3 |
| Viiv Healthcare Company | $44.00 | 2 |
| Cumberland Pharmaceuticals, Inc. | $31.45 | 2 |
What the 2025 payments were for
- Food and Beverage$194.55 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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