MS. MARGARET THERESA O'CONNOR APRN BC
NPI 1922216415
Nurse Practitioner - Adult Health in Boston, MA
About Ms. Margaret Theresa O'connor Aprn Bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARGARET THERESA O'CONNOR APRN BC (NPI 1922216415) is an individual adult health provider in Boston, Massachusetts, licensed in Massachusetts (RN 155860 NP) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Tufts Medical Center, and is a graduate of Other (1996).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ms. Margaret Theresa O'connor Aprn Bc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Margaret O'connor reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 334 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Tufts Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02111 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
BOSTON, MA 02111
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Margaret O'connor's NPI number?
The NPI number for Margaret O'connor is 1922216415. It was assigned to this individual provider in the NPPES registry on May 18, 2007.
Where is Margaret O'connor located?
Margaret O'connor practices at 750 Washington Street Nemc Gma Box 398, Boston, MA 02111. The listed phone number is (617) 636-7889.
What is Margaret O'connor's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.
Is Margaret O'connor enrolled in Medicare?
Yes. Margaret O'connor is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Margaret O'connor's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret O'connor reassigns Medicare benefits to Pratt Medical Group, Inc (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margaret O'connor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret O'connor accept?
Health plans from Anthem Blue Cross and Blue Shield list Margaret O'connor as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Margaret O'connor affiliated with any hospitals?
According to CMS data, Margaret O'connor is affiliated with Tufts Medical Center.
When was this NPI record last updated?
The NPPES record for Margaret O'connor was last updated on March 3, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Ms. Margaret Theresa O'connor, APRN BC · NPI 1922216415
Adult Health physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 18, 2007.
## Identity
- **NPI:** 1922216415 (Entity type: Individual)
- **Enumerated:** May 18, 2007
- **Primary specialty:** Nurse Practitioner - Adult Health · taxonomy 363LA2200X
- **State license:** RN 155860 NP (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 750 WASHINGTON STREET, NEMC GMA BOX 398, Boston, MA 02111-1526
- **Phone:** (617) 636-7889 · **Fax:** (617) 636-6403
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Pratt Medical Group, Inc (NPI 1013237809, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1996
## Record status
- **NPPES last updated:** March 3, 2011
- **Other identifiers:** Medicare ID-Type Unspecified NP 1478 MA (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1922216415) · Data from the CMS NPPES public registry.