Quick answers
- Where does Erin Mackay see patients?
- Medicare's clinician data lists 2 practice locations, including West Islip, NY. Call before your visit to confirm the address.
- What is Erin Mackay's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Erin Mackay accept Medicare assignment?
- Yes. Medicare's clinician data says Erin Mackay 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 Erin Mackay?
- (631) 669-2255, as listed in official Medicare / NPI Registry data.
- What is Erin Mackay's NPI number?
- 1114465754. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Erin Mackay is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Montauk HwyWest Islip, NY 11795 (631) 669‑2255
- 540 Union BlvdWest Islip, NY 11795 (631) 669‑2255
Group practices
Medicare enrollment lists Erin Mackay as a member of this group (CMS data updated 2026-10-02).
- St Francis Hospital99 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in West Islip
Clinicians with the same Medicare primary specialty in West Islip, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114465754 |
| 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
- 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