| 2686 | a7e | D | 74LHMC | Lake Huron Medical Center | Hospital |
| 2687 | a7f | D | 74MCPH | McLaren Port Huron | Hospital |
| 2688 | a80 | D | 74ARDH | Ascension River District Hospital (East China Twp.) | Hospital |
| 2695 | a87 | D | 74E911 | EMS Dispatch | EMS Dispatch |
| 2780 | adc | D | 74THEMS | Tri-Hospital EMS | EMS-Talk |
| 2781 | add | D | 74THEMS | Tri-Hospital EMS Proprietary | EMS-Talk |
| 2782 | ade | D | 74THWC | Tri-Hospital Wheelchair Units | EMS-Talk |
| 2783 | adf | D | 74THADM | Tri-Hospital Administration | EMS-Talk |
| 32806 | 8026 | D | 74PGTHEMS | Tri-Hospital EMS Paging | EMS Dispatch |
| 32977 | 80d1 | D | 74HFORD | Henry Ford Hospital Ambulance - ER | Hospital |
