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Mary C. O'Brien, MD

Specialties:
Internal Medicine
Shrewsbury Internal Medicine
604 Main Street
Shrewsbury, MA  01545
Phone: (508) 842-0057

Sarah O'Brien, CNP

Specialties:
Nurse Practitioner-Family
UMass Memorial Medical Center - Memorial Campus
119 Belmont Street
Worcester, MA  01605
Phone: (508) 334-6206

Lauren C. O'Connell, CNP

Specialties:
Nurse Practitioner-Acute Care
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-6691

Meaghan O'Connell, PA-C

Specialties:
Physician Assistant
UMass Memorial - Milford Regional Medical Center
14 Prospect Street
Milford, MA  01757
Phone: (508) 473-1190

Colette J. O'Connor, CNP

Specialties:
Nurse Practitioner-Adult-Gerontology Acute Care
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (774) 441-6468

Laurel C. O'Connor, MD

Specialties:
Emergency Medicine
Emergency Medical Services
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 421-1400

Mark J. O'Connor, Jr., MD

Specialties:
Cardiovascular Disease
HealthAlliance-Clinton Hospital, Leominster Campus
100 Hospital Road
Suite 3 A/B
Leominster, MA  01453
Phone: (978) 466-2052

Mark J. O'Connor, MD

Specialties:
Endocrinology-Diabetes
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-3206

Kevin W. O'Day, MD

Specialties:
Cardiovascular Disease
Cardiovascular Medicine
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-3452

Eileen M. O'Donnell, CRNA

Specialties:
Certified Registered Nurse Anesthetist
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 856-3271

Patrick J. O'Donnell, DO

Specialties:
Pathology/Anatomic
Pathology/Dermatopathology
Pathology/Clinical
UMass Memorial Medical Center - Biotech III
1 Innovation Drive
Worcester, MA  01605
Phone: (508) 793-6100

John B. O'Grady, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - Memorial Campus
67 Belmont Street
Worcester, MA  01605
Phone: (508) 831-3545

Tia Oh, CNP

Specialties:
Nurse Practitioner-Family
Harrington Hospitalists
100 South Street
Southbridge, MA  01550
Phone: (508) 765-9771

Young Ho Oh, MD

Specialties:
Orthopedics
Orthopedics/Sports Medicine
Southbridge Orthopedics
94 South Street
Southbridge, MA  01550
Phone: (508) 764-2772

Melissa J. Oikle, PA-C

Specialties:
Physician Assistant
Blackstone Valley Family Physicians
100 Commerce Drive
Northbridge, MA  01534
Phone: (508) 234-6311

Eromosele S. Okhuebor, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - University Campus
Hospital Medicine
55 Lake Avenue North
Cardiology
Worcester, MA  01655
Phone: (508) 334-3452

Matthew Okscin, CNP

Specialties:
Internal Medicine
Franklin Primary Care
1280 West Central Street
Suite 301
Franklin, MA  02038
Phone: (508) 528-2700

Kimberly A. Oliver, CNP

Specialties:
Nurse Practitioner-Adult
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-1975

Glen E. Ollis, CNP

Specialties:
Internal Medicine
Franklin Primary Care
1280 West Central Street
Suite 301
Franklin, MA  02038
Phone: (508) 528-2700

Caitlin E. Olsen, CNP

Specialties:
Nurse Practitioner-Acute Care
UMass Memorial Health - Marlborough Campus
159 Union Street
Marlborough, MA  01752
Phone: (508) 624-9687

Erik Olson, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 421-1401

Christina S. Olverd, PA-C

Specialties:
Physician Assistant
HealthAlliance-Clinton Hospital, Burbank Campus
275 Nichols Road
Fitchburg, MA  01420
Phone: (978) 343-5048

Samantha O'Neil, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - Hahnemann Campus
281 Lincoln Street
Worcester, MA  01605
Phone: (508) 334-5979

Issam A. Oneyssi, MD

Specialties:
Hospital Medicine
Harrington Hospitalists
100 South Street
Southbridge, MA  01550
Phone: (508) 765-9771

Nneka A. Onwubueke, MD

Specialties:
Hospital Medicine
UMass Memorial Medical Center - University Campus
Hospital Medicine
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-8515

Terra R. Organisciak, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (774) 441-6468

Kelechi M. Oriaku, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (774) 441-6468

Alan A. Orquiola, MD

Specialties:
Anesthesiology
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-3271

Laura Ortiz-Teran, MD,PhD

Specialties:
Neuroradiology
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-3850

Sheila O'Shea, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - Memorial Campus
33 Kendall Street
2nd Floor
Worcester, MA  01605
Phone: (508) 334-6255

Jodi Osterhout Vanasse, CNP

Specialties:
Nurse Practitioner-Adult
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-6691

Katya Ostrovsky, CNP

Specialties:
Nurse Practitioner-Adult
UMass Memorial Medical Center - Hahnemann Campus
291 Lincoln Street
Worcester, MA  01605
Phone: (508) 334-6251

Simon J. Ostrowski, MD

Specialties:
Emergency Medicine
Toxicology
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 421-1401

Efrain J. Otero Palacios, MD

Specialties:
Nephrology
North County Nephrology Associates
50 Memorial Drive
Leominster, MA  01453
Phone: (978) 466-4535

Joselle M. Otero Palacios, MD

Specialties:
Pediatric Emergency Medicine
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (774) 442-2599

James A. Otis, MD

Specialties:
Neurology
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-2527

Erin M. O'Toole, PA-C

Specialties:
Physician Assistant
Westborough Internal Medicine
154 East Main Street
Westborough, MA  01581
Phone: (508) 366-1120

Kayla M. Overly, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - University Campus
Hospital Medicine
55 Lake Avenue North
Neurology
Worcester, MA  01655
Phone: (508) 334-2527

Margaret A. Owegi, DO

Specialties:
Neurology
Neuromuscular Medicine
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (508) 334-2527

Erin E. Owens, CNP

Specialties:
Nurse Practitioner-Family
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Worcester, MA  01655
Phone: (774) 443-3886

Julie F. Ozaydin, MD

Specialties:
Family Medicine
Marlborough Medical Associates
340 Maple Street
Marlborough, MA  01752
Phone: (508) 481-0202

Jakub A. Pach, MD

Specialties:
Hospital Medicine
UMass Memorial Medical Center - Memorial Campus
Hospital Medicine
119 Belmont Street
Worcester, MA  01605
Phone: (508) 334-8515

Edward Pacheco, PsyD

Specialties:
Psychology
UMMMG Outpatient Psychiatry Services
100 Century Drive
Worcester, MA  01606
Phone: (508) 762-5400

Auralyd Padilla, MD

Specialties:
Psychiatry
Psychiatry/Child and Adolescent
UMMMG Outpatient Psychiatry Services
100 Century Drive
Worcester, MA  01606
Phone: (508) 762-5400

Jesica Pagano-Therrien, CNP

Specialties:
Nurse Practitioner-Pediatric Primary Care
UMass Memorial Medical Center - University Campus
55 Lake Avenue North
Pediatric Immunology
Worcester, MA  01655
Phone: (774) 442-3947

Mandy M. Page, PA-C

Specialties:
Physician Assistant
Milford Regional Urgent Care - Medway
68A Main Street
Suite 102
Medway, MA  02053-1775
Phone: (508) 321-2850

Nicholas Paicos, PA-C

Specialties:
Physician Assistant
UMass Memorial Medical Center - Memorial Campus
Hospital Medicine
119 Belmont Street
Worcester, MA  01605
Phone: (508) 334-8515

Douglas Palacios Hernandez, MD

Specialties:
Internal Medicine
Lincoln Street Internal Medicine
291 Lincoln Street
Worcester, MA  01605
Phone: (508) 799-2922