Marissa Oconnor, in Cambridge, MA - Medicare Nurse Anesthetist, Certified Registered

Marissa Oconnor, is a medicare enrolled "Nurse Anesthetist, Certified Registered" in Cambridge, Massachusetts. Her current practice location is 330 Mount Auburn St, Cambridge, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (774) 253-5361.

Marissa Oconnor is licensed to practice in Massachusetts (license number RN2294239) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1497271662.

Contact Information

	Marissa Oconnor,
	330 Mount Auburn St, Cambridge, MA 02138-5597
	(774) 253-5361
	Not Available

Map and Direction

Provider's Profile

Full Name	Marissa Oconnor
Gender	Female
Speciality	Nurse Anesthetist, Certified Registered
Location	330 Mount Auburn St, Cambridge, Massachusetts
Accepts Medicare Assignments	Medicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.

NPI Data:

NPI Number: 1497271662
Provider Enumeration Date: 08/18/2017
Last Update Date: 11/07/2025

Medicare PECOS Information:

PECOS PAC ID: 9032461553
Enrollment ID: I20181011001311

Medical Identifiers

Medical identifiers for Marissa Oconnor such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1497271662	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
367500000X	Nurse Anesthetist, Certified Registered	RN2294239 (Massachusetts)	Primary
390200000X	Student In An Organized Health Care Education/training Program	(* (Not Available))	Secondary

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. Marissa Oconnor allows following entities to bill medicare on her behalf.

Entity Name	Anaesthesia Associates Of Massachusetts, Pc
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1568415289 PECOS PAC ID: 5193611267 Enrollment ID: O20040225000842

Entity Name	Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is
Entity Type	Part B Supplier - Hospital Department(s)
Entity Identifiers	NPI Number: 1245773308 PECOS PAC ID: 6305749987 Enrollment ID: O20170628003015

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. Marissa Oconnor 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
Marissa Oconnor, 330 Mount Auburn St, Cambridge, MA 02138-5502 Ph: (774) 253-5361	Marissa Oconnor, 330 Mount Auburn St, Cambridge, MA 02138-5597 Ph: (774) 253-5361

Reviews and Comments

Nurse Anesthetist, Certified Registered Nurses in Cambridge, MA

William Paul Mailloux, C.R.N.A. Nurse Anesthetist - CR Medicare: Not Enrolled in Medicare Practice Location: 1493 Cambridge St, Cambridge Hospital Anesthesia Department, Cambridge, MA 02139 Phone: 617-665-1630 Fax: 617-665-1091
Michelle Cooper Keane, RN Nurse Anesthetist - CR Medicare: Accepting Medicare Assignments Practice Location: 330 Mount Auburn St, Cambridge, MA 02138 Phone: 617-552-4928
Guoli Chen, CRNA Nurse Anesthetist - CR Medicare: May Accept Medicare Assignments Practice Location: 1493 Cambridge Street, Cambridge Health Hospital, Cambridge, MA 02139 Phone: 617-667-3110
Ms. Erin Ann Omalley, CRNA Nurse Anesthetist - CR Medicare: Accepting Medicare Assignments Practice Location: 1493 Cambridge St, Anesthesia Dept. 3rd Floor, Cambridge, MA 02139 Phone: 617-665-1630
Valerie Sioras, CRNA Nurse Anesthetist - CR Medicare: Accepting Medicare Assignments Practice Location: 330 Mount Auburn St, Cambridge, MA 02138 Phone: 617-667-3110
Hilary C. Bloom, CRNA Nurse Anesthetist - CR Medicare: Accepting Medicare Assignments Practice Location: 330 Mount Auburn St, Cambridge, MA 02138 Phone: 617-492-3500

Marissa Oconnor, - Medicare Nurse Anesthetist, Certified Registered in Cambridge, MA