Katherine Brennan
Nurse Practitioner · Chicago, IL
Katherine Brennan is a nurse practitioner with a practice address in Chicago, Illinois, and NPI 1932502929, issued on Oct 3, 2014. Check the license (Illinois 277001645, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Brennan
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 277001645 IL
Self-reported in NPPES; status is on the state search - Practice location
- 225 E Chicago Ave, Chicago, IL 60611
- Phone
- (312) 227-4585
- Enumerated
- Oct 3, 2014
- Record last updated
- Feb 7, 2022
- Fax
- (312) 227-9388
- Medicare enrollment
- Enrolled (PECOS I20260514003824); may accept Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →
Also registered at 225 E Chicago Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jasmene Abernathy, MDStudent in an Organized Health Care Education/Training Program1881454957
- Tamkeen Abreu, PHARMD, BCPSPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1366888653
- Matthew Abts, MDPediatric Pulmonology Physician1588989750
- Samuel AccordinoStudent in an Organized Health Care Education/Training Program1194525204
- Carly Adajian, DDSDentist1184373029
- Julie Adams, RDRegistered Dietitian1417569153
Verify Katherine Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 277001645Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $3,971.73
6 payments; by number, the most common kind was travel and lodging; the largest payer was Alcresta Therapeutics, Inc. The 38,884 providers of this specialty with any payment received $791.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Katherine Brennan among 4,892 nurse practitioner records in Illinois
Katherine Brennan is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 28% of them.
- NPI issued2014 · 28% of these records are older, 69% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2014 · median 2018 among the 3,389 with a school on file
- Record last updated2022 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
952 nurse practitioner records list a practice address in Chicago
They are 952 of the 63,379 NPPES records with a practice address in Chicago, and 4,892 nurse practitioner records in Illinois.
All 4,892 in Illinois → Every provider in Chicago → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Sarah Anderson, NPChicago, IL 606111043243355
- Larry Boehlke, NPChicago, IL 606111972575231
- Joanne Cullina, MSN, APNChicago, IL 606111619904885
- Florence Denby, RN, CNP, APNChicago, IL 606111598773103
- Rebecca DukeChicago, IL 606111932204286
- Sylvia Duraski, CNP, APNChicago, IL 606111417965039
- Barbara Guido, APN-CNPChicago, IL 606111780784611
- Susanna Miranda, DNP, APRN, AGNP-CChicago, IL 606111831118512
Common questions
What is Katherine Brennan's NPI number?
Katherine Brennan's National Provider Identifier (NPI) is 1932502929, issued on Oct 3, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Brennan located?
The NPPES record lists a practice address at 225 E Chicago Ave, Chicago, IL, 60611. Phone: (312) 227-4585. Providers update this record themselves, so call before visiting.
How can I verify Katherine Brennan's license?
NPPES lists Illinois license number 277001645, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.