Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARY L BRENNAN NP
NPI 1396789509
Nurse Practitioner in Peoria, IL

Q: What is Mary Brennan's NPI number?

The NPI number for Mary Brennan is 1396789509. It was assigned to this individual provider in the NPPES registry on June 16, 2006.

Q: What is Mary Brennan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Brennan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.

Active since June 16, 2006

5401 N KNOXVILLE AVE, SUITE 119, PEORIA, IL 61614(309) 692-1700(309) 692-1771 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Mary L Brennan Np NPPES

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

MARY L BRENNAN NP (NPI 1396789509) is an individual nurse practitioner in Peoria, Illinois and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1396789509

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMARY L BRENNANCredential: NP

Location Address5401 N KNOXVILLE AVE, SUITE 119Peoria, IL 61614-5098

Mailing AddressPo Box 9726Peoria, IL 61612-9726 · (309) 671-8749 · Fax (309) 671-8740

Phone(309) 692-1700

Fax(309) 692-1771

Sole ProprietorNo

Enumeration DateJune 16, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1396789509 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

5401 N KNOXVILLE AVE, Peoria, IL 61614

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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.

YIBING LI MD

Physical Medicine & Rehabilitation

5401 N KNOXVILLE AVE, STE 117
PEORIA, IL 61614

Peoria County (309) 689-8888

PATTI L ALLY

Audiologist-Hearing Aid Fitter

5401 N KNOXVILLE AVE, SUITE 116
PEORIA, IL 61614

Peoria County (309) 282-0887

PROCTOR HEALTH SYSTEMS

Clinic/Center (Medical Specialty)

5401 N KNOXVILLE AVE, SUITE 103
PEORIA, IL 61614

Peoria County (309) 691-7800

MS. BARBARA J NALL APN

Nurse Practitioner (Women's Health)

5401 N KNOXVILLE AVE, SUITE 308
PEORIA, IL 61614

Peoria County (309) 692-5100

SUSAN GWILLIM PT

Physical Therapist

5401 N KNOXVILLE AVE, SUITE 218
PEORIA, IL 61614

Peoria County (309) 693-2244

MR. KEVIN M HENRY MD

Anesthesiology (Pain Medicine)

5401 N KNOXVILLE AVE, SUITE 416
PEORIA, IL 61614

Peoria County (309) 692-7246

MS. COLLEEN SUSANNE CUSHING RAGON APN, CNS

Nurse Practitioner (Family)

5401 N KNOXVILLE AVE
PEORIA, IL 61614

Peoria County (309) 691-1069

SUSAN J COLE, MD & ASSOCIATES

Clinic/Center (Medical Specialty)

5401 N KNOXVILLE AVE, SUITE 107
PEORIA, IL 61614

Peoria County (309) 691-2311

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 1396789509. It was assigned to this individual provider in the NPPES registry on June 16, 2006.

Where is Mary Brennan located?

Mary Brennan practices at 5401 N Knoxville Ave Suite 119, Peoria, IL 61614. The listed phone number is (309) 692-1700.

What is Mary Brennan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

When was this NPI record last updated?

The NPPES record for Mary Brennan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.