Dr Mary C O'brien, MD in Shrewsbury, MA - Medicare Internal Medicine

Dr Mary C O'brien, MD is a medicare enrolled "Internal Medicine" physician in Shrewsbury, Massachusetts. She went to State University Of New York At Stony Brook, School Of Medicine and graduated in 1991 and has 33 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Umass Memorial Medical Group Inc and her current practice location is 604 Main St, Shrewsbury, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (508) 842-0057.

Dr Mary C O'brien is licensed to practice in Massachusetts (license number 79570) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1912980434.

Contact Information

	Dr Mary C O'brien, MD
	604 Main St, Shrewsbury, MA 01545-5663
	(508) 842-0057
	Not Available

Map and Direction

Physician's Profile

Full Name	Dr Mary C O'brien
Gender	Female
Speciality	Internal Medicine
Experience	33 Years
Location	604 Main St, Shrewsbury, Massachusetts
Accepts Medicare Assignments	Yes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.

Medical Education and Training:

Dr Mary C O'brien attended and graduated from State University Of New York At Stony Brook, School Of Medicine in 1991

NPI Data:

NPI Number: 1912980434
Provider Enumeration Date: 11/29/2005
Last Update Date: 11/25/2020

Medicare PECOS Information:

PECOS PAC ID: 3577503127
Enrollment ID: I20050503001259

Medical Identifiers

Medical identifiers for Dr Mary C O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1912980434	NPI	-	NPPES
3124177	Medicaid	MA

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207R00000X	Internal Medicine	79570 (Massachusetts)	Primary

Medical Facilities Affiliation

Facility Name	Location	Facility Type
Vna Care Network	Worcester, MA	Home health agency
Umass Memorial Medical Center/university Campus	Worcester, MA	Hospital
Umass Memorial Healthcare-marlborough Hospital	Marlborough, MA	Hospital
Healthalliance Hospitals, Inc	Leominster, MA	Hospital

Group Practice Association

Group Practice Name	Group PECOS PAC ID	No. of Members
Umass Memorial Medical Group Inc	4284539891	1898

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Mary C O'brien allows following entities to bill medicare on her behalf.

Entity Name	Umass Memorial Medical Group Inc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1760445373 PECOS PAC ID: 4284539891 Enrollment ID: O20040113000267

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Mary C O'brien is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Dr Mary C O'brien, MD Po Box 415348, Boston, MA 02241-5348 Ph: () -	Dr Mary C O'brien, MD 604 Main St, Shrewsbury, MA 01545-5663 Ph: (508) 842-0057

Reviews and Comments

Internal Medicine Doctors in Shrewsbury, MA

Dr. Raymond R Zhou, M.D., PH.D. Internal Medicine Medicare: Medicare Enrolled Practice Location: 415 Boston Tpke, Suite 105, Shrewsbury, MA 01545 Phone: 508-845-8200 Fax: 508-845-8300
Dr. Durga B Bathini, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 26 Julio Dr, Shrewsbury, MA 01545 Phone: 508-842-5594
Dr. Carlos Alberto Perez-velazquez, M.D Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 26 Julio Dr, Shrewsbury, MA 01545 Phone: 508-842-5594 Fax: 508-842-0989
Kenneth H Kronlund Jr., MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 378 Maple Ave, Shrewsbury, MA 01545 Phone: 508-595-2513 Fax: 508-595-2021
Prashantha Devidas Holla, MD Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 378 Maple Ave, Shrewsbury, MA 01545 Phone: 508-595-2513 Fax: 508-595-2021
Dr. Kenneth A Stevens, M.D. Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 26 Julio Dr, Shrewsbury, MA 01545 Phone: 508-842-5594
Sapna S Savant, MD Internal Medicine Medicare: Medicare Enrolled Practice Location: 555 Main St, Shrewsbury, MA 01545 Phone: 508-845-8520 Fax: 508-845-8534

Dr Mary C O'brien, MD - Medicare Internal Medicine in Shrewsbury, MA