Brennan, Gillian

Brennan, Gillian was paid $1.18M by Medicaid between Jan 2018 and Sep 2024, across 8 billing codes. Its largest line is 99469, Subsequent inpatient neonatal critical care, per day, 28 days or younger — 32% of everything it billed.

33Billing provider infoBRENNAN, GILLIAN
CHICAGO, IL 60637

33aNPI1174782437assigned 06/03/2008

33bProvider typeNeonatal-Perinatal Medicine Physician

28Total paid$1.18M

24GClaims8,140

24DCodes billed8

24AFirst – last monthJan 2018 – Sep 2024

Compared with peers

Next to other Neonatal-Perinatal Medicine Physician providers in Illinois

Rank by total paid#3 of 148

Median peer was paid$48K

This provider vs. median24×

Peers share this provider's primary NPPES type and state. Size alone says nothing about billing quality: a big agency or a hospital system is expected to sit far above the median.

Box 24A · Dates of service

Paid by month

Paid that monthNov–Dec 2024: claims still arriving when the file was cut, so these months run low for every provider

By year, as a table

Year	Claims	Paid
2018	1,303	$189K
2019	968	$182K
2020	2,023	$314K
2021	712	$56K
2022	2,103	$345K
2023	771	$72K
2024incomplete	260	$21K

Box 24 · Service lines

What it billed for

Code	Service	Share	Claims	Bene. records	Paid
99469	Subsequent inpatient neonatal critical care, per day, 28 days or younger	32%	1,499	363	$373K
99472	Subsequent inpatient pediatric critical care, per day, 2-5 years	31%	1,503	216	$372K
99479	Subsequent intensive care, per day, very low birth weight infant	17%	2,478	753	$199K
99480	Subsequent intensive care, per day, low birth weight infant	16%	2,389	759	$185K
99468		2.2%	45	44	$27K
99477		1.1%	61	58	$14K
99478		<1%	114	31	$10K
99238	Hospital discharge day management, 30 minutes or less	<1%	51	48	$2K

Claims and beneficiary counts add up across code × month rows, so one patient seen every month counts many times. Rows with fewer than 12 claims are suppressed by HHS, so small lines can be missing.