Quick answers
- Which hospitals does Marie Obrien work at?
- Medicare's official clinician data lists Marie Obrien at 1 hospital: John T Mather Memorial Hospital of Port Jefferson. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marie Obrien see patients?
- Medicare's clinician data lists 1 practice location in Port Jefferson, NY. Call before your visit to confirm the address.
- What is Marie Obrien's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Marie Obrien accept Medicare assignment?
- Yes. Medicare's clinician data says Marie Obrien 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 Marie Obrien offer telehealth?
- Medicare's clinician data says Marie Obrien offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Marie Obrien?
- (631) 473-1320, as listed in official Medicare / NPI Registry data.
- What is Marie Obrien's NPI number?
- 1073860607. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marie Obrien works
Medicare's Facility Affiliation Data lists Marie Obrien 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
Practice locations
Addresses where Marie Obrien is enrolled with Medicare (CMS data updated 2026-10-02).
- 75 N Country RdPort Jefferson, NY 11777 (631) 473‑1320
Group practices
Medicare enrollment lists Marie Obrien as a member of this group (CMS data updated 2026-10-02).
- John T Mather Memorial Hospital175 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Port Jefferson
Clinicians with the same Medicare primary specialty in Port Jefferson, NY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073860607 |
| 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