Medicare Advantage Provider Directory

The network providers listed in the directory below have agreed to provide you with your health care services. All providers in this provider directory accept both Medicare and Medicaid.

  • For dental services – Search the online directory – Select Choose a location and plan, enter your address, city, or zip code, and under Plan name select NY Nascentia Medicare listed under NY. For assistance please call 1-844-824-2024 (TTY: 1-800-466-7566).
  • For vision services – Search the online directory. For assistance please call Member Services at 1-888-477-0090 (TTY: 711) or Superior Vision at 1-800-879-6901.
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O’Brien, Alex David, NP

Listed in ,
University of Rochester Medical Center
Gastrointestinal Group
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Male
(585) 275-4711

601 Elmwood Avenue
Rochester, NY 14642

O’Brien, Alex David, NP

Listed in ,
University of Rochester Medical Center
Gastrointestinal Group
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Male
(585) 275-4711

1000 South Avenue
Rochester, NY 14620

O’Brien, Alison L, DO

Listed in , ,
University of Rochester Medical Center
University of Rochester - Primary Care - North Greece Internal Medicine and Pediatrics
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Female
(585) 602-0100

60 Greece Center Drive
Suite 4
Rochester, NY 14612

O’Brien, Alison Theresa, MD

Listed in ,
Bassett Healthcare Network
Mary Imogene Bassett Hospital
County:
Delaware
Language(s):
English
Gender:
Female
(607) 746-0550

460 Andes Road
Delhi, NY 13753

O’Brien, Bailey Aileen, GC

Listed in ,
Albany Medical Center
Maternal Fetal Medicine at AMC
County:
Albany
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(518) 262-4942

391 Myrtle Avenue
Suite 2
Albany, NY 12208

O’Brien, Christopher J, PA

Listed in ,
Nephrology Hypertension Associates of CNY, PC
County:
Onondaga
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(315) 410-6400

6846 Buckley Road
North Syracuse, NY 13212

O’Brien, Colette, NP

Listed in ,
United Health Services Hospitals, Inc. - Binghamton General Hospital
County:
Broome
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(607) 240-2879

4433 Vestal Parkway East
Vestal, NY 13850

O’Brien, David, PA

Listed in ,
Ellis Hospital
County:
Schenectady
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(518) 243-4135

1101 Nott Street
Schenectady, NY 12308

O’Brien, James, PA-C

Listed in ,
Bassett Healthcare Network
Mary Imogene Bassett Hospital
County:
Otsego
Language(s):
English
Gender:
Male
(607) 547-3981

1 Atwell Road
Cooperstown, NY 13326

O’Brien, Jeanne, MD

Listed in ,
University of Rochester
University Urology Associates
County:
Monroe
Accepting New Patients:
Yes
Language(s):
English, French
Gender:
Female
(585) 275-2838

158 Sawgrass Drive
2nd Floor
Rochester, NY 14620

O’Brien, Jeanne, MD

Listed in ,
University of Rochester
University Urology Associates
County:
Monroe
Accepting New Patients:
Yes
Language(s):
English, French
Gender:
Female
(585) 275-2838

601 Elmwood Avenue
Rochester, NY 14642

O’Brien, John, MD

Listed in ,
St. Joseph's Hospital Health Center
Primary Care Center
County:
Onondaga
Language(s):
English
Gender:
Male
(315) 448-5375

301 Prospect Avenue
6th Floor
Syracuse, NY 13203

O’Brien, John, MD

Listed in ,
Crouse Medical Practice
County:
Onondaga
Accepting New Patients:
No
Language(s):
English
Gender:
Male
(315) 652-6551

8324 Oswego Road
Suite D
Liverpool, NY 13090

O’Brien, John P, MD

Listed in ,
St. Joseph's Medical PC
County:
Onondaga
Language(s):
English
Gender:
Male
(315) 448-5111

301 Prospect Avenue
Syracuse, NY 13203

O’Brien, John P, MD

Listed in ,
St. Joseph's Medical PC
County:
Madison
Language(s):
English
Gender:
Male
(315) 655-8171

132 1/2 Albany Street
Cazenovia, NY 13035

O’Brien, Megan, MSPT

Listed in ,
Maple City Physical Therapy, PLLC
Maple City Physical Therapy
County:
Steuben
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(607) 324-9344

55 Broadway Mall
Hornell, NY 14843

O’Brien, Megan, MSPT

Listed in ,
Maple City Physical Therapy, PLLC
Maple City Physical Therapy
County:
Allegany
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(607) 260-4080

2 South Main Street
Andover, NY 14806

O’Brien, Michael Francis, III, PA

Listed in ,
Ellis Hospital
Ellis Primary Care - Clifton Park
County:
Saratoga
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(518) 579-2650

103 Sitterly Road
Suite 2300
Clifton Park, NY 12065

O’Brien, Michael Francis, III, PA

Listed in ,
Ellis Hospital
Emergency & Urgent Care
County:
Schenectady
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(518) 243-1916

1101 Nott Street
Schenectady, NY 12308

O’Brien, Rachel L, NP

Listed in ,
SUNY Health Science Center at Syracuse dba University Hospital
County:
Onondaga
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(315) 464-8224

550 Harrison Street
Syracuse, NY 13202

O’Brien, Rachel L, NP

Listed in ,
SUNY Health Science Center at Syracuse dba University Hospital
County:
Onondaga
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(315) 464-5466

750 East Adams Street
Syracuse, NY 13210

O’Brien, Rachel L, NP

Listed in ,
SUNY Health Science Center at Syracuse dba University Hospital
County:
Onondaga
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(315) 492-5007

4900 Broad Road
Syracuse, NY 13215

O’Brien, Rosalie M, NP

Listed in , ,
University of Rochester
University Orthopaedic Associates of Rochester
County:
Monroe
Language(s):
English
Gender:
Female
(585) 275-5321

10 Miracle Mile Drive
Rochester, NY 14623

O’Brien, Rosalie M, NP

Listed in ,
University of Rochester
University Orthopaedic Associates of Rochester
County:
Ontario
Language(s):
English
Gender:
Female
(585) 275-5321

699 South Main Street
Suite #3
Canandaigua, NY 14424

O’Brien, Rosalie M, NP

Listed in ,
University of Rochester
University Orthopaedic Associates of Rochester
County:
Ontario
Language(s):
English
Gender:
Female
(585) 275-5321

7670 Omnitech Place
Victor, NY 14564
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Online directory last updated on January 2, 2026

Download the Provider Directory (pdf), updated January 2, 2026

Page last updated on January 29, 2026