MS. MARY J BRENNAN APRN-BC
NPI 1699782623
Nurse Practitioner - Acute Care in Portland, ME
About Ms. Mary J Brennan Aprn-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARY J BRENNAN APRN-BC (NPI 1699782623) is an individual acute care provider in Portland, Maine, licensed in Maine (CNP211468) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and maintains a secondary practice location in Portsmouth.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 2
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. Mary J Brennan 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 Reassignments
2Medicare enrollment records show Mary Brennan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Westbrook, ME 04092
- Reassigned Medicare billing, Maine enrollment
- 3,140 clinicians in this Medicare group
Portland, ME 04102
- Reassigned Medicare billing, Maine enrollment
- 264 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Maine Medical Center
Acute Care Hospitals · Portland, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04102 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 14
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 Mary Brennan's NPI number?
The NPI number for Mary Brennan is 1699782623. It was assigned to this individual provider in the NPPES registry on August 2, 2006.
Where is Mary Brennan located?
Mary Brennan practices at 10 Andover Rd, Portland, ME 04102. The listed phone number is (207) 761-6642.
What is Mary Brennan's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Mary Brennan enrolled in Medicare?
Yes. Mary Brennan 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 Mary Brennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Brennan reassigns Medicare benefits to 2 organizations: Mainehealth (Westbrook, ME) and Maine Medical Partners (Portland, ME). 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 Mary Brennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Brennan affiliated with any hospitals?
According to CMS data, Mary Brennan is affiliated with Maine Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Brennan was last updated on December 21, 2021. 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.
# Ms. Mary J Brennan, APRN-BC · NPI 1699782623
Acute Care physician in Portland, Maine. Individual provider, active in the CMS NPPES registry since August 2, 2006.
## Identity
- **NPI:** 1699782623 (Entity type: Individual)
- **Enumerated:** August 2, 2006
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** CNP211468 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 ANDOVER RD, Portland, ME 04102-1954
- **Phone:** (207) 761-6642
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mainehealth (NPI 1790265502, Westbrook, ME); Maine Medical Partners (NPI 1124335591, Portland, ME) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** December 21, 2021
- **Other identifiers:** Medicaid 30347119 (NH); Medicaid 432951999 (ME)
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Source: [NPI Profile](https://npiprofile.com/npi/1699782623) · Data from the CMS NPPES public registry.