Karen E O'brien, MD - Medicare Obstetrics/gynecology in South Weymouth, MA

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Karen E O'brien, MD is a medicare enrolled "Obstetrics & Gynecology - Maternal & Fetal Medicine" physician in South Weymouth, Massachusetts. She went to Georgetown University School Of Medicine and graduated in 1996 and has 28 years of diverse experience with area of expertise as Obstetrics/gynecology. She is a member of the group practice South Shore Medical Center, Inc. and her current practice location is 55 Fogg Rd, South Weymouth, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (781) 624-8000.

Karen E O'brien is licensed to practice in Massachusetts (license number 218797) 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 1780623215.

Contact Information

Karen E O'brien, MD
55 Fogg Rd,
South Weymouth, MA 02190-2432
(781) 624-8000
Not Available

Map and Direction




Physician's Profile

Full NameKaren E O'brien
GenderFemale
SpecialityObstetrics/gynecology
Experience28 Years
Location55 Fogg Rd, South Weymouth, Massachusetts
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Karen E O'brien attended and graduated from Georgetown University School Of Medicine in 1996
  NPI Data:
  • NPI Number: 1780623215
  • Provider Enumeration Date: 06/06/2006
  • Last Update Date: 10/19/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 6406748227
  • Enrollment ID: I20040326000773

Medical Identifiers

Medical identifiers for Karen E O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1780623215NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207VM0101XObstetrics & Gynecology - Maternal & Fetal Medicine 218797 (Massachusetts)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
South Shore Medical Center, Inc.3678487444149

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. Karen E O'brien allows following entities to bill medicare on her behalf.
Entity NameHarvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1518908136
PECOS PAC ID: 4486567104
Enrollment ID: O20031204000710
Entity NameSouth Shore Medical Center, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1669411856
PECOS PAC ID: 3678487444
Enrollment ID: O20040413000332
Entity NameBeth Israel Deaconess Medical Center Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548202641
PECOS PAC ID: 8123936119
Enrollment ID: O20041001000827
Entity NameCoastal Medical Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932175684
PECOS PAC ID: 7113029257
Enrollment ID: O20070221000057

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. Karen E 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 AddressPractice Location Address
Karen E O'brien, MD
330 Brookline Ave,
Boston, MA 02215-5400

Ph: (617) 667-4836		Karen E O'brien, MD
55 Fogg Rd,
South Weymouth, MA 02190-2432

Ph: (781) 624-8000

Reviews and Comments


Obstetrics & Gynecology Doctors in South Weymouth, MA

Dr. Katelyn Mcgovern Dorney, MD
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 101 Columbian St, South Weymouth, MA 02190
Phone: 781-624-5000    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.