Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Marie O'Brien, ANP

Individual provider Adult Health Nurse Practitioner · NPI 1073860607

Marie O'Brien, ANP is a Nurse Practitioner in Port Jefferson, New York. Qualified in 2012, 14 years ago. Practices with John T Mather Memorial Hospital, a 180-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
14
Licensed in
NY
In the registry since
2012
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Practice location Address checks out

75 N Country Rd
Port Jefferson, NY 11777-2119 Not confirmed with CMS for 14 years — call before visiting
Phone: (631) 473-1320
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence F306181-1 (NY)

Record details

NPI number1073860607
Entity typeIndividual (Type 1)
GenderFemale
Credentials ANP
Sole proprietorNo
NPI enumeratedAugust 14, 2012
Last updated in NPPESAugust 14, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice John T Mather Memorial Hospital — 180 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients54
Services billed 87 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at John T Mather Memorial Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 180 clinicians in the practice; 12 are shown here.

Other providers in Port Jefferson