Quick answers
- Which hospitals does Thomas M. Karoff work at?
- Medicare's official clinician data lists Thomas M. Karoff at 1 hospital: White Plains Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas M. Karoff see patients?
- Medicare's clinician data lists 2 practice locations, including Harrison, NY and Mount Kisco, NY. Call before your visit to confirm the address.
- What is Thomas M. Karoff's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Thomas M. Karoff accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas M. Karoff 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 Thomas M. Karoff?
- (914) 723-8100, as listed in official Medicare / NPI Registry data.
- What is Thomas M. Karoff's NPI number?
- 1366642142. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas M. Karoff works
Medicare's Facility Affiliation Data lists Thomas M. Karoff 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 Thomas M. Karoff is enrolled with Medicare (CMS data updated 2026-10-02).
- 600 Mamaroneck AveHarrison, NY 10528 (914) 723‑8100
- 90 S Bedford RdMount Kisco, NY 10549 (914) 241‑1050
Group practices
Medicare enrollment lists Thomas M. Karoff as a member of these groups (CMS data updated 2026-10-02).
- Optum Medical Care PC1,010 clinicians in the group
- 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 | DO |
|---|---|
| Medical school | Northeastern Ohio University College Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366642142 |
| 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