Missing Millions · 2026 estimate

Illinois is missing 404,100 lung cancer screenings.

About 1 in 10 adults ages 50 to 80 in Illinois qualifies for lung cancer screening and hasn't been screened. Find your county below.

500,700adults qualify for screening under USPSTF 2021 criteria (estimate)
19.3%were screened, 19th of 51 (American Lung Association, 2025); 18.2% nationally
18,302low-dose CT screening scans billed to Medicare fee-for-service by Illinois providers in 2024

Sources: U.S. Census Bureau Population Estimates 2025; CDC PLACES 2025; USPSTF 2021; American Lung Association, State of Lung Cancer 2025; CMS Medicare Physician and Other Practitioners 2024 (CPT 71271). Modeled estimates; see methodology below.

The gap, county by county

Shade shows how many adults ages 50 to 80 are missing screening. Select a county.

Cook County

143,200

missing lung cancer screenings (estimate)

  • Qualify for screening177,400
  • Adults 50 to 80 missing screening1 in 11
  • Medicare low-dose CT scans, 20248,348
Open the Cook County page

Every Illinois county, ranked

Ranked by estimated missing screenings. Select a column to sort.
1Cook County143,200177,4001 in 118,348
2DuPage County24,00029,7001 in 131,418
3Will County21,80027,0001 in 11553
4Lake County19,90024,7001 in 12561
5Kane County15,00018,6001 in 11294
6Winnebago County11,90014,8001 in 8451
7McHenry County10,30012,8001 in 11259
8Madison County9,70012,0001 in 943
9St. Clair County9,70012,0001 in 91,097
10Sangamon County7,3009,0001 in 101,927
11Peoria County6,3007,8001 in 918
12Rock Island County5,6006,9001 in 9383
13Tazewell County5,0006,1001 in 90
14LaSalle County4,8005,9001 in 8199
15Champaign County4,7005,8001 in 11548
16McLean County4,5005,6001 in 11318
17Kankakee County4,2005,2001 in 9372
18Macon County4,2005,2001 in 8349
19Kendall County3,5004,4001 in 110
20Vermilion County3,4004,3001 in 70
21DeKalb County2,9003,6001 in 100
22Williamson County2,9003,6001 in 90
23Adams County2,6003,2001 in 9212
24Whiteside County2,4002,9001 in 90
25Knox County2,3002,8001 in 822
26Macoupin County2,2002,7001 in 80
27Boone County2,1002,6001 in 90
28Ogle County2,1002,6001 in 90
29Stephenson County2,0002,5001 in 80
30Franklin County2,0002,4001 in 70
31Henry County2,0002,4001 in 90
32Grundy County1,9002,3001 in 947
33Marion County1,8002,2001 in 70
34Coles County1,8002,2001 in 8399
35Jefferson County1,7002,1001 in 8287
36Fulton County1,7002,1001 in 763
37Jackson County1,7002,1001 in 912
38Christian County1,6002,0001 in 80
39Lee County1,5001,9001 in 823
40Livingston County1,5001,9001 in 80
41Bureau County1,5001,8001 in 80
42Clinton County1,5001,8001 in 90
43Morgan County1,4001,8001 in 80
44Randolph County1,4001,8001 in 80
45Effingham County1,4001,7001 in 90
46Woodford County1,3001,7001 in 100
47Montgomery County1,3001,6001 in 80
48Iroquois County1,3001,6001 in 812
49Monroe County1,2001,5001 in 110
50Logan County1,1001,4001 in 80
51Saline County1,1001,4001 in 861
52Perry County1,0001,3001 in 70
53Fayette County1,0001,2001 in 70
54Jo Daviess County1,0001,2001 in 100
55Shelby County9801,2001 in 80
56Jersey County9201,1001 in 90
57McDonough County9001,1001 in 926
58Union County8601,1001 in 70
59Edgar County8401,0001 in 80
60Crawford County8401,0001 in 80
61Hancock County7809701 in 90
62Wayne County7809701 in 70
63Douglas County7809601 in 80
64Carroll County7709501 in 80
65White County7208901 in 70
66Mercer County7108801 in 80
67Lawrence County7008701 in 70
68Massac County7008601 in 80
69Bond County6908601 in 80
70De Witt County6908601 in 80
71Richland County6808501 in 80
72Pike County6808501 in 70
73Clark County6708301 in 80
74Clay County6708301 in 70
75Warren County6508101 in 90
76Johnson County6408001 in 70
77Mason County6307801 in 80
78Moultrie County6207701 in 80
79Piatt County6107601 in 100
80Ford County5907301 in 80
81Greene County5907301 in 70
82Washington County5707101 in 90
83Marshall County5506801 in 80
84Menard County5206401 in 90
85Cass County5106301 in 80
86Wabash County5006301 in 80
87Cumberland County4405501 in 90
88Schuyler County4004901 in 70
89Jasper County3904901 in 90
90Hamilton County3904801 in 70
91Henderson County3304001 in 80
92Edwards County3204001 in 70
93Alexander County3103901 in 60
94Pulaski County3103801 in 60
95Brown County3003601 in 70
96Gallatin County2703301 in 70
97Putnam County2403001 in 100
98Stark County2402901 in 80
99Scott County2202801 in 80
100Pope County2202701 in 80
101Hardin County2102601 in 70
102Calhoun County1902301 in 100

Methodology

How we estimate the gap

A modeled estimate from public data only. It is not a count of patients and contains no patient information.

missing = adults 50 to 80 × county smoking rate × national eligibility factor × (1 − state screening rate)

  • Adults 50 to 80: U.S. Census Bureau, Population Estimates, Vintage 2025
  • Smoking: CDC PLACES 2025 release (Kentucky and Pennsylvania: 2024 release)
  • Eligibility: USPSTF 2021 criteria, scaled to about 14.5 million eligible adults nationally
  • Screening rates: American Lung Association, State of Lung Cancer 2025
  • Who is missing: Census population estimates (age) and American Community Survey 2020 to 2024 (language)
  • Screening activity: CMS Medicare fee-for-service claims for low-dose CT (CPT 71271), 2024, by provider location

Estimates under 50 are shown as "fewer than 50"; others are rounded. Full methodology

Many of them are already your patients.

Oatmeal Health helps health systems and community health centers find, navigate, and screen the people who qualify, alongside the care teams you already have.

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