Quick answers
- Which hospitals does Mark J. Titi work at?
- Medicare's official clinician data lists Mark J. Titi at 2 hospitals: Lancaster General Hospital and WellSpan Ephrata Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark J. Titi see patients?
- Medicare's clinician data lists 1 practice location in Lancaster, PA. Call before your visit to confirm the address.
- What is Mark J. Titi's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Internal Medicine.
- Does Mark J. Titi accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Titi 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 Mark J. Titi's NPI number?
- 1649268525. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark J. Titi works
Medicare's Facility Affiliation Data lists Mark J. Titi 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
- WellSpan Ephrata Community HospitalEphrata, PA · Acute Care Hospital · CCN 390225
Practice locations
Addresses where Mark J. Titi is enrolled with Medicare (CMS data updated 2026-10-02).
- 2445 Marietta AveLancaster, PA 17601
Specialties
- Allergy/Immunologyprimary
- Internal Medicinealso
Other allergist and immunologists in Lancaster
Clinicians with the same Medicare primary specialty in Lancaster, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649268525 |
| 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