Quick answers
- Which hospitals does Michael J. Dayan work at?
- Medicare's official clinician data lists Michael J. Dayan at 2 hospitals: John T Mather Memorial Hospital of Port Jefferson and North Shore University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael J. Dayan see patients?
- Medicare's clinician data lists 3 practice locations, including Roslyn, NY, Point Pleasant Boro, NJ and Port Jefferson, NY. Call before your visit to confirm the address.
- What is Michael J. Dayan's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Michael J. Dayan accept Medicare assignment?
- Yes. Medicare's clinician data says Michael J. Dayan 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 Michael J. Dayan?
- (732) 390-0040, as listed in official Medicare / NPI Registry data.
- What is Michael J. Dayan's NPI number?
- 1063898567. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael J. Dayan works
Medicare's Facility Affiliation Data lists Michael J. Dayan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · CCN 330185
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
Practice locations
Addresses where Michael J. Dayan is enrolled with Medicare (CMS data updated 2026-10-02).
- 120 Ash DrRoslyn, NY 11576 (732) 390‑0040
- 3822 River RdPoint Pleasant Boro, NJ 08742 (732) 892‑1200
- 75 N Country RdPort Jefferson, NY 11777 (631) 473‑1320
Group practices
Medicare enrollment lists Michael J. Dayan as a member of these groups (CMS data updated 2026-10-02).
- University Radiology Group LLC239 clinicians in the group
- John T Mather Memorial Hospital175 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1063898567 |
| 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