In 2024, 127 clinical laboratories billed Medicare for laboratory testing in Illinois: 15,019,133 services and an estimated $260.9M in Medicare payments. Below: the top 5 by service volume, straight from CMS's public billing data.
Ranked by 2024 Medicare service volume across the family's codes.
| # | Provider | Specialty | City | Services | Est. Medicare paid |
|---|---|---|---|---|---|
| 1 | Quest Diagnostics Llc Il | Clinical Laboratory | Wood Dale | 3,499,811 | $41.9M |
| 2 | Star Lab, Inc | Clinical Laboratory | Franklin Park | 2,250,952 | $4.4M |
| 3 | Chicago Clinical Laboratories, Ltd | Clinical Laboratory | Northbrook | 944,343 | $4.9M |
| 4 | Laboratory Corporation Of America | Clinical Laboratory | Itasca | 908,432 | $7.3M |
| 5 | Heritage Lab Express Inc | Clinical Laboratory | Crete | 898,086 | $1.0M |
The same 2024 Medicare data, sliced by city: the biggest laboratory testing cities by number of laboratories, in est.-Medicare-paid order.
In 2024 the top city for laboratory testing in Illinois by est. Medicare paid was Chicago: 31 clinical laboratories billed 462,760 services for an estimated $150.7M, led by Central Clinical Labs, Inc, with 102,274 services (est. $787K Medicare paid).
| # | City | Laboratories | Services | Est. Medicare paid | City leader (2024) |
|---|---|---|---|---|---|
| 1 | Chicago | 31 | 462,760 | $150.7M | Central Clinical Labs, Inc · 102,274 services · est. $787K |
| 2 | Skokie | 3 | 366,467 | $3.1M | Lifescan Labs Of Illinois, LLC · 268,490 services · est. $1.0M |
| 3 | Downers Grove | 6 | 75,713 | $2.2M | Apex Quality Health · 29,743 services · est. $1.1M |
| 4 | Niles | 4 | 67,928 | $1.1M | American Scientific Laboratory Inc · 54,715 services · est. $961K |
| 5 | Des Plaines | 4 | 21,852 | $791K | Serviam Diagnostics Lab LLC · 15,678 services · est. $452K |
City totals are cut from the same public CMS data as everything above: Medicare fee-for-service only, after CMS's under-11-beneficiary suppression, dollars always est. Medicare paid. Where a city shows fewer than 3 laboratories, we show the totals and name no one. Naming is capped by design: up to 5 ranked laboratories above plus at most one leader per city here, and no one else on this page.
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