Quick answers
- Which hospitals does Joseph An work at?
- Medicare's official clinician data lists Joseph An at 3 hospitals: Berkeley Medical Center, Jefferson Medical Center and Winchester Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joseph An see patients?
- Medicare's clinician data lists 1 practice location in Martinsburg, WV. Call before your visit to confirm the address.
- What is Joseph An's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Joseph An accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph An 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 Joseph An offer telehealth?
- Medicare's clinician data says Joseph An offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Joseph An?
- (304) 267-1944, as listed in official Medicare / NPI Registry data.
- What is Joseph An's NPI number?
- 1144512450. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joseph An works
Medicare's Facility Affiliation Data lists Joseph An at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Berkeley Medical CenterMartinsburg, WV · Acute Care Hospital · CCN 510008
- Jefferson Medical CenterRanson, WV · Critical Access Hospital · CCN 511319
- Winchester Medical CenterWinchester, VA · Acute Care Hospital · CCN 490005
Practice locations
Addresses where Joseph An is enrolled with Medicare (CMS data updated 2026-10-02).
- 2000 Foundation Way, Suite 2600Martinsburg, WV 25401 (304) 267‑1944
Group practices
Medicare enrollment lists Joseph An as a member of this group (CMS data updated 2026-10-02).
- West Virginia University Medical Corporation1,980 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Martinsburg
Clinicians with the same Medicare primary specialty in Martinsburg, WV — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1144512450 |
| 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