| Region | System # | Organization | City, State | Zip Code | Phone Number |
| Reg 1 | 0121 | OSF Northern Region EMS System | Rockford, IL | 61108 | 815-395-5254 |
| 0139 | MercyRockford EMS System | Rockford, IL | 61103 | 815-971-5205 | |
| 0165 | KishHealth EMS System | DeKalb, IL | 60115 | 815-756-1521 | |
| 0175 | Swedish American Hospital | Rockford, IL | 61104 | 779-696-6081 | |
| Reg 2 | 0215 | Unity Point Health -- Trinity | Rock Island, IL | 61201 | 309-779-7756 |
| 0218 | Peoria Area EMS System | Peoria, IL | 61637 | 309-655-2113 | |
| 0219 | McDonough District Hospital | Macomb, IL | 61455 | 309-836-1542 | |
| 0237/0238 | McLean County Area EMS System | Bloomington, IL | 61701 | 309-827-4348 | |
| 0242 | OSF St. Mary Medical Center | Galesburg, IL | 61401 | 309-344-3161 | |
| 0243 | Galesburg Cottage Hospital | Galesburg, IL | 61401 | 309-345-4217 | |
| 0253 | Genesis EMS System (Genesis Medical Center, Silvis) | Silvis, IL | 61282 | 309-281-4038 | |
| 0254 | Illinois Valley EMS System | Peru, IL | 61354 | 815-780-3114 | |
| 0256 | Ottawa Regional EMS System | Ottawa, IL | 61350 | 815-433-3100 | |
| 0257 | OSF St. James Medical Center | Pontiac, IL | 61764 | 815-842-6821 | |
| 0279 | UnityPoint Health Resource Hospital | Peoria, IL | 61614-5076 | 309-683-6180 | |
| Reg 3 | 0316 | St. John's Hospital | Springfield, IL | 62769 | 217-544-6464 |
| 0320 | Quincy Area EMS System, Blessing Hospital | Quincy, IL | 62301 | 217-223-8400 | |
| 0327 | Memorial Medical Center | Springfield, IL | 62781 | 217-788-3973 | |
| 0360 | Jersey Community Hospital EMS | Jerseyville, IL | 62052 | 618-498-8449 | |
| 0369 | Illinois State Police | Springfield, IL | 62712 | 217/786-6756 | |
| Reg 4 | 0425 | Southwestern IL EMS System (Memorial Hospital) | Belleville, IL | 62226 | 618-257-5874 |
| 0432 | Anderson Hospital | Maryville, IL | 62062 | 618-391-6558 | |
| 0451 | Alton Memorial Hospital | Alton, IL | 62002 | 618-258-9930 | |
| 0473 | OSF Saint Anthony's Health Center | Alton, IL | 62002-0340 | 618-463-5243 | |
| 0476 | HSHS Holy Family Hospital | Greenville, IL | 62246 | 618-664-1230 | |
| 0481 | HSHS St. Elizabeth | O'Fallon, IL | 62269 | 618-234-2120 | |
| Reg 5 | 0526 | Good Samaritan Regional EMS System | Mt. Vernon, IL | 62864 | 618-899-1010 |
| 0530 | Memorial Hosp. Of Carbondale | Carbondale, IL | 62902-9000 | 618-549-0721 | |
| 0562 | Heartland Regional Medical Center | Marion, IL | 62959 | 618-998-7555 | |
| 0574 | Coal Mine EMS System | Springfield, IL | 62702 | 217-558-4925 | |
| Reg 6 | 0623 | St. Mary's Hospital | Decatur, IL | 62521 | 217-464-2708 |
| 0633 | Sarah Bush Lincoln Health Center | Mattoon, IL | 61938 | 217-348-2403 | |
| 0644 | Carle Regional EMS Office | Champaign, IL | 61820 | 217-355-3550 | |
| 0671 | East Central Illinois EMS | Urbana, IL | 61801 | 217-359-6619 | |
| Reg 7 | 0704 | South Cook County EMS System, Ingalls Memorial Hospital | Harvey, IL | 60426 | 708-915-6900 |
| 0710 | Silver Cross EMS System | New Lenox, IL | 60451 | 815-300-1100 | |
| 0712 | Presence St. Mary's Hospital | Kankakee, IL | 60901 | 815-937-2104 | |
| 0729 | Christ Medical Center | Oak Lawn, IL | 60453 | 708-684-3794 | |
| 0746 | Riverside Medical Center | Bradley, IL | 60915 | 815-935-9366 | |
| 0777 | Morris Hospital | Morris, IL | 60450 | 815-705-7188 | |
| Reg 8 | 0805 | Loyola University Medical Center | Maywood, IL | 60153 | 708-327-2544 |
| 0828 | Advocate Good Samaritan Hospital | Downers Grove, IL | 60515 | 630-275-1371 | |
| 0849 | Central DuPage EMS System, Central DuPage Hospital | Winfield, IL | 60190 | 630-933-6910 | |
| 0859 | Edward Hospital EMS System, Edward Hospital EMS | Naperville, IL | 60540 | 630-527-3332 | |
| Reg 9 | 0906 | McHenry Western Lake County EMS System | McHenry, IL | 60050 | 815-759-8044 |
| 0907 | Northwest Community Hospital | Arlington Heights, IL | 60005 | 847-618-4485 | |
| 0909 | Greater Elgin Area EMS System, Advocate Sherman Hospital | Elgin, IL | 60123 | 224-783-8737 | |
| 0948 | Southern Fox EMS System, Delnor Community Hospital | Geneva, IL | 60134 | 630-938-8460 | |
| 0961 | Presence St. Joseph Hospital-Elgin | Elgin, IL | 60123 | 847-695-3200 | |
| 0980 | Advocate Lutheran General EMS System Office | Niles, IL | 60714 | 847-723-5951 | |
| Reg 10 | 1002 | Highland Park Hospital | Highland Park, IL | 60035 | 847-480-3787 |
| 1011 | Presence St. Francis Hospital | Evanston, IL | 60202 | 847-316-6119 | |
| 1014 | Vista Health System, North Lake County EMS | Waukegan, IL | 60085 | 847-360-2205 | |
| 1072 | Condell Medical Center | Libertyville, IL | 60048 | 847-990-5319 | |
| 1082 | Northwestern Lake Forest Hospital | Lake Forest, IL | 60045 | 847-234-5600 | |
| Reg 11 | 1103 | Chicago North EMS System (Illinois Masonic) | Chicago, IL | 60657 | 773-296-7269 |
| 1108 | Chicago Central EMS System (Northwestern Memorial) | Chicago, IL | 60611 | 312-926-5393 | |
| 1113 | Chicago South EMS System (University of Chicago) | Chicago, IL | 60637 | 773-702-9502 | |
| 1178 | Chicago West EMS System (Stroger Hospital) | Chicago, IL | 60612-3723 | 312-864-0077 | |
| Reg 12 | 1236 | Mercy Medical Center | Dubuque, IA | 52001 | 563-589-8034 |
| 1241 | Union Hospital | Terre Haute, IN | 47804 | 812-238-7523 | |
| 1275 | Deaconess Hospital | Evansville, IN | 47747 | 812-450-6064 |