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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Massachi, Sasha, MD

Listed in ,
University of Rochester
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Female
(585) 275-2100

601 Elmwood Avenue
Rochester, NY 14642

Massachi, Sasha, MD

Listed in ,
University of Rochester
Department of Psychiatric Clinical Group University of Rochester
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Female
(585) 275-4501

601 Elmwood Avenue
Rochester, NY 14642

Massaro, Michael P, PT

Listed in ,
Excelsior Orthopaedics, LLP
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(716) 250-6500

3925 Sheridan Drive
Amherst, NY 14226

Massaro, Michael P, PT

Listed in ,
Excelsior Orthopaedics, LLP
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Male
(716) 250-6500

260 Redtail Road
Orchard Park, NY 14127

Massena Center LLC dba Massena Dialysis Center

Listed in
County:
St. Lawrence
Accepting New Patients:
Yes
Language(s):
English
(315) 705-0101

290 Main Street
Massena, NY 13662

Massena Hospital, Inc.

Listed in
County:
St. Lawrence
Accepting New Patients:
Yes
Language(s):
English
(315) 769-4200

1 Hospital Drive
Massena, NY 13662

Masseth, Jennifer A, PA-C

Listed in ,
University of Rochester
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Female
(585) 275-5823

875 Hard Road
Webster, NY 14580

Masseth, Jennifer A, PA-C

Listed in ,
University of Rochester
County:
Monroe
Accepting New Patients:
No
Language(s):
English
Gender:
Female
(585) 275-2100

601 Elmwood Avenue
Rochester, NY 14642

Massett, Shelby, NP

Listed in ,
Schweiger Dermatology Group, PLLC
County:
Monroe
Language(s):
English
Gender:
Female
(585) 256-0555

2150 South Clinton Avenue
Rochester, NY 14618

Massett, Shelby, NP

Listed in ,
Schweiger Dermatology Group, PLLC
County:
Monroe
Language(s):
English
Gender:
Female
(585) 256-0555

2140 South Clinton Avenue
Rochester, NY 14618

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 608-2226

3245 Southwestern Boulevard
Orchard Park, NY 14127

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 395-2043

3450 Union Road
Cheektowaga, NY 14225

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 541-0550

3921 Harlem Road
Amherst, NY 14226

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 541-0224

3980 Sheridan Drive
Amherst, NY 14226

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 608-2236

4827 Transit Road
Depew, NY 14043

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 926-6358

4923 Southwestern Boulevard
Hamburg, NY 14075

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 932-1198

5495 Sheridan Drive
Buffalo, NY 14221

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Niagara
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 280-6589

5801 South Transit Road
Lockport, NY 14094

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 428-5545

5965 Transit Road
East Amherst, NY 14051

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Niagara
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 371-4260

7432 Niagara Falls Boulevard
Niagara Falls, NY 14304

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 608-2236

2980 Sheridan Drive
Tonawanda, NY 14150

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 262-3161

1597 Elmwood Avenue
Buffalo, NY 14207

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 541-0234

1751 Sheridan Drive
Tonawanda, NY 14223

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 608-0041

1956 Ridge Road
West Seneca, NY 14224

Massey, Allissa L, NP

Listed in ,
Wellnow Urgent Care
County:
Erie
Accepting New Patients:
Yes
Language(s):
English
Gender:
Female
(716) 599-1163

225 South Cascade Drive
Springville, NY 14141
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Online directory last updated on October 10, 2025

Download the Provider Directory (pdf), updated October 10, 2025

Page last updated on October 16, 2025