Quick answers
- Which hospitals does Karen J. Leiser work at?
- Medicare's official clinician data lists Karen J. Leiser at 1 hospital: White Plains Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Karen J. Leiser see patients?
- Medicare's clinician data lists 1 practice location in Harrison, NY. Call before your visit to confirm the address.
- What is Karen J. Leiser's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Karen J. Leiser accept Medicare assignment?
- Yes. Medicare's clinician data says Karen J. Leiser 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 the phone number for Karen J. Leiser?
- (914) 723-8100, as listed in official Medicare / NPI Registry data.
- What is Karen J. Leiser's NPI number?
- 1073689055. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karen J. Leiser works
Medicare's Facility Affiliation Data lists Karen J. Leiser at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- White Plains Hospital CenterWhite Plains, NY · Acute Care Hospital · CCN 330304
Practice locations
Addresses where Karen J. Leiser is enrolled with Medicare (CMS data updated 2026-10-02).
- 600 Mamaroneck AveHarrison, NY 10528 (914) 723‑8100
Group practices
Medicare enrollment lists Karen J. Leiser as a member of this group (CMS data updated 2026-10-02).
- White Plains Physician Services PC386 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Harrison
Clinicians with the same Medicare primary specialty in Harrison, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073689055 |
| 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