Katherine Brennan
Nurse Practitioner β’ Chicago, IL
225 E Chicago Ave
Chicago, IL 606112991
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
225 E Chicago Ave
Chicago, IL 606112991
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Georgetown University School Of Medicine
2014
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2024
All general payments: $3,971.73 across 6 records.
By nature of payment
- Honoraria: $2,920.00 across 1 record.
- Travel and Lodging: $876.03 across 3 records.
- Food and Beverage: $175.70 across 2 records.
Reporting-company totals
- Alcresta Therapeutics, Inc.: $3,971.73 across 6 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).
Years since graduation
12 years (graduated 2014)
CMS Doctors and Clinicians data list 2014 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2014
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Katherine Brennan has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Katherine Brennan as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Chicago and Illinois
952 active clinicians are listed under Nurse Practitioner with a practice address in Chicago, IL (4,894 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
20% of these 952 clinicians have the CMS telehealth indicator.
56.2% of these 952 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $54.69 in 2023 to $3,971.73 in 2024.
- 2023: $54.69
- 2024: $3,971.73
Sources: CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 β December 31, 2024): fewer than 11 records totaling $3,971.73.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Alcresta Therapeutics, Inc. |
Honoraria
Cash or cash equivalent
|
RELIZORB | General | $2,920.00 |
| Alcresta Therapeutics, Inc. |
Travel and Lodging
In-kind items and services
|
RELIZORB | General | $417.95 |
| Alcresta Therapeutics, Inc. |
Travel and Lodging
In-kind items and services
|
RELIZORB | General | $292.67 |
| Alcresta Therapeutics, Inc. |
Travel and Lodging
Cash or cash equivalent
|
RELIZORB | General | $165.41 |
| Alcresta Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
RELIZORB | General | $103.59 |
| Alcresta Therapeutics, Inc. |
Food and Beverage
Cash or cash equivalent
|
RELIZORB | General | $72.11 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2022-02-07NUCC Taxonomy Code: 363L00000X
(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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20260514003824
IL
2668941071
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Medical Genetics - Clinical Genetics (M.D.)
Doctor of Osteopathic Medicine (D.O.)
Audiologist
Doctor of Audiology
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Nurse Practitioner (license number reported to NPPES: IL 277001645)
NPI status registered as active in NPPES database
Registered at 225 E CHICAGO AVE, CHICAGO, IL 606112991 (Tel: 3122274585)
Registered at 225 E CHICAGO AVE, CHICAGO, IL 606112991
Recorded as KATHERINE BRENNAN
Nurse Practitioner (license number reported to NPPES: IL 209011912)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Chicago
- Samantha Schuldt, FNP-C
- Anitra Kemp-Major, MSN, FNP-C
- Anitha Philip, RN
- Paul Antczak, APN-CNP
- Giavonna Lindsey, FNP-BC
- Florence Pascua, APRN, AGPCNP-BC
Mailing Address
225 E Chicago Ave
Chicago, IL 606112991