| Business | Phone |
| Professional Health Care Systs 825 E Crosstown Pkwy, Kalamazoo 49001 | (269) 345-0837 |
| Medical Manager 1000 Inkster Ave, Kalamazoo 49008 | (269) 553-6515 |
| Medical Reimbursement Solution 5320 Holiday Ter, Kalamazoo 49009 | (269) 375-6079 |
| Michigan Health Partners 6563 W Main St, Kalamazoo 49009 | (269) 353-5121 |