Quick answers
- Which hospitals does Stephen Machnicki work at?
- Medicare's official clinician data lists Stephen Machnicki at 1 hospital: Lenox Hill Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen Machnicki see patients?
- Medicare's clinician data lists 3 practice locations, including New York, NY, Weston, CT and Rego Park, NY. Call before your visit to confirm the address.
- What is Stephen Machnicki's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Stephen Machnicki accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen Machnicki 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 Stephen Machnicki?
- (212) 434-2140, as listed in official Medicare / NPI Registry data.
- What is Stephen Machnicki's NPI number?
- 1881778827. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen Machnicki works
Medicare's Facility Affiliation Data lists Stephen Machnicki at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lenox Hill HospitalNew York, NY · Acute Care Hospital · CCN 330119
Practice locations
Addresses where Stephen Machnicki is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 E 77th StNew York, NY 10075 (212) 434‑2140
- 2 Graylock RdWeston, CT 06883 (469) 925‑2709
- 9525 Queens BlvdRego Park, NY 11374 (718) 360‑5522
Group practices
Medicare enrollment lists Stephen Machnicki as a member of these groups (CMS data updated 2026-10-02).
- North Shore-Lij Medical PC6,440 clinicians in the group
- Lenox Hill Radiology and Medical Imaging Associates PC244 clinicians in the group
- Southside Faculty Medical Affiliates University Faculty Practice Corp231 clinicians in the group
- Delaware Radiology Associates PA65 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881778827 |
| 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