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MARY THERESA BRENNAN CPNP
NPI 1336984368
Nurse Practitioner - Pediatrics in Boston, MA

Active since July 01, 2024PECOS EnrolledAccepts Medicare Assignment
300 LONGWOOD AVE, BOSTON, MA 02115(617) 355-6000 Get Directions Write a Review

NPPES record last updated: March 26, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Mar 26, 2025, Jul 1, 2024 (2 updates tracked since 2024).

About Mary Theresa Brennan Cpnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY THERESA BRENNAN CPNP (NPI 1336984368) is an individual pediatrics provider in Boston, Massachusetts, licensed in Massachusetts (RN2334511) and active in the NPI registry since July 2024. She is enrolled in Medicare PECOS, maintains a secondary practice location in Boston, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1336984368
Entity TypeIndividualFemale
Primary Taxonomy363LP0200X
Provider Legal NameMARY THERESA BRENNANCredential: CPNP
Location Address300 LONGWOOD AVEBoston, MA 02115-5724
Mailing Address300 Longwood AveBoston, MA 02115-5724 · (617) 355-6000
Phone(617) 355-6000
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateJuly 1, 2024
Last NPPES UpdateMarch 26, 20252 updates tracked since enumeration
NPPES CertifiedMarch 26, 2025
✔ NPI 1336984368 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · PediatricsPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0200X
License✔ Licensed in MA · RN2334511
Also ListedRegistered NurseTaxonomy 163W00000X · License RN2334511 (MA)
300 LONGWOOD AVE, Boston, MA 02115
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Secondary Practice Location 1

Location 151 Blossom StBoston, MA 02114-2601 · Phone (617) 722-6000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mary Theresa Brennan Cpnp 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.

PECOS PAC ID5890224992
PECOS Enrollment IDI20250117001406
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

JULIE ANN HANSEN LCSW
Social Worker (Clinical)
300 LONGWOOD AVE
BOSTON, MA 02115
Suffolk County (857) 218-4309
MS. ANNA ROGLIERI
Nurse Practitioner (Psychiatric/Mental Health)
300 LONGWOOD AVE
BOSTON, MA 02115
Suffolk County (617) 355-6000
STEPHEN G. FLYNN M.D.
Anesthesiology (Pediatric Anesthesiology)
300 LONGWOOD AVE
BOSTON, MA 02115
Suffolk County (617) 355-6000
MISS LAUREN ASHLEY MASTERSON P.T., D.P.T
Physical Therapist
300 LONGWOOD AVE
BOSTON, MA 02115
Suffolk County (617) 355-7216
MS. SOYUN KWAN LICSW
Social Worker (Clinical)
300 LONGWOOD AVE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115
Suffolk County (617) 355-0567
PUJA BANKA M.D.
Pediatrics
300 LONGWOOD AVE, BADER 203
BOSTON, MA 02115
Suffolk County (617) 355-6363
MR. COURTNEY SULLIVAN FRATTO CPNP
Nurse Practitioner (Pediatrics)
300 LONGWOOD AVE, HUNNEWELL BUILDING 322
BOSTON, MA 02115
Suffolk County (857) 218-4085
DR. ELIZABETH S TAGLAUER M.D., PH.D.
Pediatrics (Neonatal-Perinatal Medicine)
300 LONGWOOD AVE
BOSTON, MA 02115
Suffolk County (617) 355-6000

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 1336984368. It was assigned to this individual provider in the NPPES registry on July 1, 2024.

Where is Mary Brennan located?

Mary Brennan practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.

What is Mary Brennan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.

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.

When was this NPI record last updated?

The NPPES record for Mary Brennan was last updated on March 26, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.