Quick answers
- Which hospitals does William Tester work at?
- Medicare's official clinician data lists William Tester at 2 hospitals: Jefferson Stratford Hospital and Thomas Jefferson University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Tester see patients?
- Medicare's clinician data lists 1 practice location in Philadelphia, PA. Call before your visit to confirm the address.
- What is William Tester's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does William Tester accept Medicare assignment?
- Yes. Medicare's clinician data says William Tester 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 William Tester offer telehealth?
- Medicare's clinician data says William Tester offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William Tester?
- (215) 955-8874, as listed in official Medicare / NPI Registry data.
- What is William Tester's NPI number?
- 1386613693. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Tester works
Medicare's Facility Affiliation Data lists William Tester at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Jefferson Stratford HospitalStratford, NJ · Acute Care Hospital · CCN 310086
- Thomas Jefferson University HospitalPhiladelphia, PA · Acute Care Hospital · CCN 390174
Practice locations
Addresses where William Tester is enrolled with Medicare (CMS data updated 2026-10-02).
- 925 Chestnut St, Suite 3Philadelphia, PA 19107 (215) 955‑8874
Group practices
Medicare enrollment lists William Tester as a member of this group (CMS data updated 2026-10-02).
- Jefferson University Physicians1,531 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Philadelphia
Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Hahnemann University College Of Medicine |
| Graduation year | 1972 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386613693 |
| 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