Williamson, Margaret

Williamson, Margaret was paid $277K by Medicaid between Jan 2018 and Nov 2024, across 3 billing codes. Its largest line is 99285, emergency room visit (most serious) — 52% of everything it billed.

33Billing provider infoWILLIAMSON, MARGARET
OAK LAWN, IL 60453

33aNPI1154514867assigned 08/26/2007

33bProvider typeEmergency Medicine Physician

28Total paid$277K

24GClaims4,677

24DCodes billed3

24AFirst – last monthJan 2018 – Nov 2024

Compared with peers

Next to other Emergency Medicine Physician providers in Illinois

Rank by total paid#512 of 1,980

Median peer was paid$150K

This provider vs. median1.8×

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	488	$21K
2019	671	$28K
2020	979	$50K
2021	536	$36K
2022	736	$48K
2023	584	$39K
2024incomplete	683	$54K

Box 24 · Service lines

What it billed for

Code	Service	Share	Claims	Bene. records	Paid
99285	Emergency room visit (most serious)Emergency department visit for the evaluation and management, high severity with immediate threat to life	52%	2,095	1,897	$145K
99284	Emergency room visit (serious)Emergency department visit for the evaluation and management, high severity	39%	1,838	1,654	$107K
99283	Emergency room visit (moderate)Emergency department visit for the evaluation and management, moderate severity	8.8%	744	681	$24K

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.