Elisa A O'brien, APRN - Medicare Nurse Practitioner in Greenwich, CT

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Elisa A O'brien, APRN is a medicare enrolled "Nurse Practitioner - Family" in Greenwich, Connecticut. She graduated from nursing school in 2011 and has 13 years of diverse experience with area of expertise as Nurse Practitioner. She is a member of the group practice Northeast Medical Group Inc and her current practice location is 17 Woods Ave, Greenwich, Connecticut. You can reach out to her office (for appointments etc.) via phone at (203) 531-0729.

Elisa A O'brien is licensed to practice in Connecticut (license number 004842) 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 1912262973.

Contact Information

Elisa A O'brien, APRN
17 Woods Ave,
Greenwich, CT 06831-3633
(203) 531-0729
Not Available

Map and Direction




Provider's Profile

Full NameElisa A O'brien
GenderFemale
SpecialityNurse Practitioner
Experience13 Years
Location17 Woods Ave, Greenwich, Connecticut
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:
  • Elisa A O'brien graduated from nursing school in 2011
  NPI Data:
  • NPI Number: 1912262973
  • Provider Enumeration Date: 07/05/2012
  • Last Update Date: 03/19/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 3274799713
  • Enrollment ID: I20120727000012

Medical Identifiers

Medical identifiers for Elisa A O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1912262973NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363LF0000XNurse Practitioner - Family 073864 (Connecticut)Secondary
363LF0000XNurse Practitioner - Family 004842 (Connecticut)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Greenwich Hospital Association -Greenwich, CTHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Northeast Medical Group Inc12542338361244

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. Elisa A O'brien allows following entities to bill medicare on her behalf.
Entity NameNortheast Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043278351
PECOS PAC ID: 1254233836
Enrollment ID: O20040123000522

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. Elisa A 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
Elisa A O'brien, APRN
17 Woods Ave,
Greenwich, CT 06831-3633

Ph: (203) 531-0729		Elisa A O'brien, APRN
17 Woods Ave,
Greenwich, CT 06831-3633

Ph: (203) 531-0729

Reviews and Comments


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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.