MONICA L O'BRIEN NP
NPI 1639459498
Nurse Practitioner - Psychiatric/Mental Health in Brockton, MA
About Monica L O'brien Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MONICA L O'BRIEN NP (NPI 1639459498) is an individual psychiatric/mental health provider in Brockton, Massachusetts, licensed in Massachusetts (RN231518) and active in the NPI registry since August 2011. She is enrolled in Medicare PECOS, is affiliated with Signature Healthcare Brockton Hospital, and maintains a secondary practice location in Springfield.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Monica L O'brien Np 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 Reassignments
10Medicare enrollment records show Monica O'brien reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brockton, MA 02302
- Reassigned Medicare billing, Massachusetts enrollment
- 81 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 409 clinicians in this Medicare group
Quincy, MA 02169
- Reassigned Medicare billing, Massachusetts enrollment
- 101 clinicians in this Medicare group
Westwood, MA 02090
- Reassigned Medicare billing, Massachusetts enrollment
- 76 clinicians in this Medicare group
Cambridge, MA 02141
- Reassigned Medicare billing, Massachusetts enrollment
- 44 clinicians in this Medicare group
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 991 clinicians in this Medicare group
S Attleboro, MA 02703
- Reassigned Medicare billing, Massachusetts enrollment
- 68 clinicians in this Medicare group
New Bedford, MA 02740
- Reassigned Medicare billing, Massachusetts enrollment
- 196 clinicians in this Medicare group
Springfield, MA 01104
- Reassigned Medicare billing, Massachusetts enrollment
- 10 clinicians in this Medicare group
Brooklyn, NY 11235
- Reassigned Medicare billing, New York enrollment
- 638 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 2
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.
Signature Healthcare Brockton Hospital
Acute Care Hospitals · Brockton, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02302 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BROCKTON, MA 02302
BROCKTON, MA 02302
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 Monica O'brien's NPI number?
The NPI number for Monica O'brien is 1639459498. It was assigned to this individual provider in the NPPES registry on August 25, 2011.
Where is Monica O'brien located?
Monica O'brien practices at 680 Centre St, Brockton, MA 02302. The listed phone number is (508) 941-7228.
What is Monica O'brien's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.
Is Monica O'brien enrolled in Medicare?
Yes. Monica O'brien 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 organizations bill Medicare for Monica O'brien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Monica O'brien reassigns Medicare benefits to 10 organizations: Brockton Hospital, Inc. (Brockton, MA), Signature Healthcare Medical Group Inc (Brockton, MA), South Shore Mental Health Center, Inc. (Quincy, MA), Uhs Of Westwood Pembroke Inc (Westwood, MA), Vinfen Corporation (Cambridge, MA) and 5 more organizations, listed in the Medicare section above. Each 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 Monica O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Monica O'brien accept?
Health plans from Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care, Taro Health and UnitedHealthcare list Monica O'brien 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 Monica O'brien affiliated with any hospitals?
According to CMS data, Monica O'brien is affiliated with Signature Healthcare Brockton Hospital.
When was this NPI record last updated?
The NPPES record for Monica O'brien was last updated on April 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Monica L O'brien, NP · NPI 1639459498
Psychiatric/Mental Health physician in Brockton, Massachusetts. Individual provider, active in the CMS NPPES registry since August 25, 2011.
## Identity
- **NPI:** 1639459498 (Entity type: Individual)
- **Enumerated:** August 25, 2011
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** RN231518 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 680 CENTRE ST, Brockton, MA 02302-3308
- **Phone:** (508) 941-7228
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Brockton Hospital, Inc. (NPI 1063431286, Brockton, MA); Signature Healthcare Medical Group Inc (NPI 1508804949, Brockton, MA); South Shore Mental Health Center, Inc. (NPI 1770528317, Quincy, MA); Uhs Of Westwood Pembroke Inc (NPI 1760453328, Westwood, MA); Vinfen Corporation (NPI 1225168271, Cambridge, MA); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** April 25, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1639459498) · Data from the CMS NPPES public registry.