Quick answers
- Which hospitals does Mark Stein work at?
- Medicare's official clinician data lists Mark Stein at 3 hospitals: Hudson Valley Hospital Center, Mount Sinai Beth Israel and New York-Presbyterian Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Stein see patients?
- Medicare's clinician data lists 1 practice location in New York, NY. Call before your visit to confirm the address.
- What is Mark Stein's specialty?
- Medicare lists Medical Oncology as the primary specialty.
- Does Mark Stein accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Stein 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 Mark Stein offer telehealth?
- Medicare's clinician data says Mark Stein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Mark Stein's NPI number?
- 1568549319. 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 Stein works
Medicare's Facility Affiliation Data lists Mark Stein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hudson Valley Hospital CenterCortlandt Manor, NY · Acute Care Hospital · CCN 330267
- Mount Sinai Beth IsraelNew York, NY · Acute Care Hospital · closed, according to its website · CCN 330169
- New York-Presbyterian HospitalNew York, NY · Acute Care Hospital · CCN 330101
Practice locations
Addresses where Mark Stein is enrolled with Medicare (CMS data updated 2026-10-02).
- 622 W 168th StNew York, NY 10032
Group practices
Medicare enrollment lists Mark Stein as a member of this group (CMS data updated 2026-10-02).
- Trustees of Columbia University in the City of New York2,296 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1568549319 |
| 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