Quick answers
- Which hospitals does Donald K. Marcus work at?
- Medicare's official clinician data lists Donald K. Marcus at 4 hospitals: Holy Redeemer Hospital and Medical Center, Jefferson Health- Northeast, Nazareth Hospital and St Mary Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Donald K. Marcus see patients?
- Medicare's clinician data lists 1 practice location in Southampton, PA. Call before your visit to confirm the address.
- What is Donald K. Marcus's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Infectious Disease.
- Does Donald K. Marcus accept Medicare assignment?
- Yes. Medicare's clinician data says Donald K. Marcus accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Donald K. Marcus offer telehealth?
- Medicare's clinician data says Donald K. Marcus offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Donald K. Marcus's NPI number?
- 1003880071. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Donald K. Marcus works
Medicare's Facility Affiliation Data lists Donald K. Marcus at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holy Redeemer Hospital and Medical CenterMeadowbrook, PA · Acute Care Hospital · CCN 390097
- Jefferson Health- NortheastPhiladelphia, PA · Acute Care Hospital · CCN 390115
- Nazareth HospitalPhiladelphia, PA · Acute Care Hospital · CCN 390204
- St Mary Medical CenterLanghorne, PA · Acute Care Hospital · CCN 390258
Practice locations
Addresses where Donald K. Marcus is enrolled with Medicare (CMS data updated 2026-10-02).
- 729 Grove Ave, Unit 4Southampton, PA 18966
Group practices
Medicare enrollment lists Donald K. Marcus as a member of this group (CMS data updated 2026-10-02).
- Infectious Diseases Associates PC10 clinicians in the group
Specialties
- Internal Medicineprimary
- Infectious Diseasealso
Other internal medicine doctors in Southampton
Clinicians with the same Medicare primary specialty in Southampton, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003880071 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians