Quick answers
- Which hospitals does Christine E. Callahan work at?
- Medicare's official clinician data lists Christine E. Callahan at 4 hospitals: Lancaster General Hospital, Milton S Hershey Medical Center, Penn State Health Lancaster Medical Center and UPMC Pinnacle Hospitals. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Christine E. Callahan see patients?
- Medicare's clinician data lists 1 practice location in Hershey, PA. Call before your visit to confirm the address.
- What is Christine E. Callahan's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Christine E. Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Christine E. Callahan 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.
- What is Christine E. Callahan's NPI number?
- 1811910581. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Christine E. Callahan works
Medicare's Facility Affiliation Data lists Christine E. Callahan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lancaster General HospitalLancaster, PA · Acute Care Hospital · CCN 390100
- Milton S Hershey Medical CenterHershey, PA · Acute Care Hospital · CCN 390256
- Penn State Health Lancaster Medical CenterLancaster, PA · Acute Care Hospital · CCN 390339
- UPMC Pinnacle HospitalsHarrisburg, PA · Acute Care Hospital · CCN 390067
Practice locations
Addresses where Christine E. Callahan is enrolled with Medicare (CMS data updated 2026-10-02).
- 500 Universidy DrHershey, PA 17033
Group practices
Medicare enrollment lists Christine E. Callahan as a member of this group (CMS data updated 2026-10-02).
- The Milton S Hershey Medical Center Physicians Group1,623 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Hershey
Clinicians with the same Medicare primary specialty in Hershey, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811910581 |
| 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