Value explorer / IL

IL: the directory by county and ZIP

218,788
practitioners
42.5%
have a workplace
71,342
provider organizations
67,610
tax records (not added)
103
counties

The bar is the share with a workplace listed, not the number of practitioners. Ranking by headcount would just rank by population.

CountyPractitionersHas a workplaceProvider orgsTax recordsZIPs
+Cook County86,65936.1%28,27631,468162
+DuPage County24,43643.7%6,9457,83435
+(county unknown)20,94776.2%1,2301,00287
+Lake County12,31937.5%3,5884,16727
+Will County7,88642.7%2,8553,16231
+Kane County6,33133.1%1,9332,20019
+Madison County4,44350.2%1,2581,21022
+McHenry County4,42429.4%1,2121,45118
+St. Clair County3,77943.1%1,2341,20322
+Winnebago County3,74342.2%1,0961,09618
+Sangamon County3,64143.1%89284120
+Champaign County3,38542.2%67458415
+Peoria County3,19647.6%1,00578820
+McLean County2,83839.8%71371215
+LaSalle County1,75255.7%41044217
+Rock Island County1,67626.6%52256710
+Williamson County1,49922.5%3983546
+DeKalb County1,44834.9%40345710
+Adams County1,40456.7%2912176
+Macon County1,30338.2%37036910
+Tazewell County1,29634.6%39941811
+Coles County1,29655.5%2101974
+Kankakee County98832.8%53754112
+Vermilion County89425.7%8,29725714
+Kendall County87437.6%3163716
+Jackson County84541.3%2571969
+Jefferson County74655.4%2662448
+Whiteside County72460.9%1961847
+Stephenson County71850.8%1651765
+Saline County65552.7%1671645
+Franklin County6259.8%1471249
+Lee County60920.9%1291094
+Grundy County54849.1%2102356
+Monroe County47534.1%1391623
+Marion County47251.3%1891938
+Henry County42654.0%129999
+Effingham County42336.4%1961826
+Warren County41478.3%69725
+Knox County38029.2%2251467
+Piatt County34682.1%41394
+Ford County33155.0%96554
+Macoupin County32550.8%15615913
+Livingston County32238.2%1131028
+Christian County30060.3%109948
+Ogle County29445.6%1081179
+Crawford County28961.9%82794
+Morgan County28344.2%1701374
+Montgomery County25353.4%1091005
+Fulton County22544.4%91858
+Boone County22442.9%1001143
+Randolph County21941.1%1561107
+Iroquois County21730.9%1169311
+McDonough County21334.3%103784
+Richland County20413.7%87733
+Woodford County20156.2%841057
+Logan County20144.3%80483
+Perry County19723.9%105913
+Jo Daviess County19360.1%67728
+Lawrence County18817.6%46353
+De Witt County17763.3%64602
+Edgar County17135.1%67514
+Cass County16719.8%51305
+Union County16023.1%80614
+Wabash County15538.7%46402
+Johnson County1498.7%26185
+Wayne County13347.4%61444
+Hancock County12642.1%54448
+Massac County12623.0%49502
+Bureau County12525.6%11810811
+Clinton County12535.2%871068
+White County12534.4%57634
+Bond County12036.7%65654
+Jasper County10414.4%26162
+Clay County9924.2%48273
+Jersey County9621.9%52582
+Shelby County9424.5%54588
+Douglas County9354.8%71647
+Moultrie County8122.2%44573
+Fayette County7428.4%69728
+Pike County7312.3%54464
+Mercer County6765.7%46516
+Washington County6744.8%59407
+Edwards County6520.0%16142
+Carroll County5831.0%33347
+Mason County5635.7%32303
+Alexander County4721.3%32124
+Schuyler County4245.2%20231
+Brown County4122.0%25171
+Henderson County3661.1%563
+Clark County3531.4%42513
+Menard County2948.3%29243
+Greene County2839.3%26274
+Hamilton County2010.0%29272
+Cumberland County1926.3%21203
+Marshall County1631.2%38424
+Hardin County1346.2%13113
+Pulaski County1020.0%11134
+Stark County875.0%18113
+Calhoun County560.0%15121
+Scott County40.0%12142
+Putnam County333.3%462
+Gallatin County30.0%463
+Pope County10.0%211

By profession, statewide

ProfessionPractitionersHas a workplace
behavioral-health56,41623.6%
physician54,02971.3%
rehab-therapy31,83226.5%
advanced-practice24,49179.8%
dental10,96913.0%
pharmacy9,5112.4%
nursing6,81739.9%
student5,34614.0%
chiropractic4,78748.6%
other-clinical4,33222.4%
eye-vision2,79366.4%
dietary2,54824.0%
group1,87458.1%
podiatry1,35871.6%
support87610.4%
facility30721.2%
agency14725.2%
no-taxonomy1414.3%
supplier9819.4%
emergency-medical7529.3%
transport3414.7%
payer728.6%

Release 2026-08-20. Methodology 0.7.3-draft.

Counts come from the NDH bulk export at the release named above. Organizations are split by record type and never summed: roughly half the Organization file is `ein` tax records that carry an NPI and an address, so adding them to provider organizations roughly doubles the count. Practitioner geography uses the primary address; 14.85% of practitioners list addresses in more than one state and are counted only in the first. Counties are derived from the Census ZCTA-to-county relationship file, taking the county holding the largest share of a ZIP's population; ZIPs with no dominant county are grouped as unknown. Payer organizations carry no address at all and cannot appear in any geography. Profession categories here come from the directory's own Practitioner.qualification taxonomy, not from NPPES. H54 categorises the same practitioners against their NPPES taxonomy and lands 1 to 2 points different per profession as a result: PA physicians read 73.0% here and 74.3% there. Neither is wrong. This view describes what the directory says about itself, which is the right frame for a directory explorer; H54 asks how the directory compares to the federal registry.

Data as JSON: /api/v1/explorer/il.json. Looking for one provider? Search by name or NPI.