THERESA SHANAHAN
NPI 1598598690
Nurse Practitioner - Primary Care in Brookline, MA
About Theresa Shanahan NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THERESA SHANAHAN (NPI 1598598690) is an individual primary care provider in Brookline, Massachusetts, licensed in Massachusetts (RN2379864) and active in the NPI registry since August 2024. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses
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
Theresa Shanahan 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 Theresa Shanahan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 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
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02445 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Theresa Shanahan's NPI number?
The NPI number for Theresa Shanahan is 1598598690. It was assigned to this individual provider in the NPPES registry on August 23, 2024.
Where is Theresa Shanahan located?
Theresa Shanahan practices at 1 Brookline Pl Ste 225, Brookline, MA 02445. The listed phone number is (857) 307-4400.
What is Theresa Shanahan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.
Is Theresa Shanahan enrolled in Medicare?
Yes. Theresa Shanahan 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 Theresa Shanahan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Shanahan reassigns Medicare benefits to Brigham & Womens Physicians Organization 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 Theresa Shanahan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theresa Shanahan accept?
Health plans from Taro Health list Theresa Shanahan 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 Theresa Shanahan affiliated with any hospitals?
According to CMS data, Theresa Shanahan is affiliated with Massachusetts General Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Theresa Shanahan was last updated on October 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Theresa Shanahan · NPI 1598598690
Primary Care physician in Brookline, Massachusetts. Individual provider, active in the CMS NPPES registry since August 23, 2024.
## Identity
- **NPI:** 1598598690 (Entity type: Individual)
- **Enumerated:** August 23, 2024
- **Primary specialty:** Nurse Practitioner - Primary Care · taxonomy 363LP2300X
- **State license:** RN2379864 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BROOKLINE PL STE 225, Brookline, MA 02445-7294
- **Phone:** (857) 307-4400 · **Fax:** (857) 307-4414
## 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:** Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** October 30, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1598598690) · Data from the CMS NPPES public registry.