Donald K. Marcus, M.D.
NPI 1003880071ActiveIndividual· Internal Medicine, Infectious Disease· Southampton, PA
Internal Medicine, Infectious Disease (M.D.) in Southampton, Pennsylvania, trained at Boston University School of Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $1,792,427 for 1,017 claims, against $187,229 paid for services in 2024. Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $480.47 in all, mostly food and beverage.
Overview
| NPI | 1003880071 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 15, 2006 |
| Last updated in NPPES | May 18, 2021 |
| Certified by provider | May 18, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | MD031686E | PA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,021 |
|---|---|
| Services billed | 3,081 across 23 procedure codes |
| Paid by Medicare | $187,229 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,017 · 1,330 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $1,792,427 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Infectious Diseases Associates PCSouthampton, PA · 10 clinicians
Hospital affiliations
- Holy Redeemer Hospital and Medical CenterMeadowbrook, PA
- Jefferson Health- NortheastPhiladelphia, PA
- Nazareth HospitalPhiladelphia, PA
- St Mary Medical CenterLanghorne, PA
Industry payments (Open Payments)
- 2025$480.47 · 13 payments from 7 companies
- 2024$560.17 · 23 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $211.80 | 3 |
| Insmed, Inc. | $82.98 | 2 |
| Viiv Healthcare Company | $75.05 | 3 |
| Melinta Therapeutics, LLC | $39.48 | 2 |
| Ferring Pharmaceuticals Inc. | $28.89 | 1 |
What the 2025 payments were for
- Food and Beverage$415.51 · 12 payments
- Education$64.96 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Infectious Disease providers in Southampton
- 1225092117
- 1578537684
- 1386907426
- 1154396729
- 1881668879
- 1114188893
- 1639143738
- 1346253663
- 1134315674
- 1588639165
- 1730139544
- 1215943907
All Internal Medicine, Infectious Disease providers in Pennsylvania →