| Business | Phone |
| Water Quality Laboratory 175 College St, Battle Creek 49017 | (269) 969-6161 |
| Doctors Group Laboratory Svc 842 Columbia Ave E, Battle Creek 49015 | (269) 565-0403 |
| Regional Medical Lab Inc 3600 Capital Ave Sw, Battle Creek 49015 | (269) 979-6420 |
| Regional Medical Lab Inc-Oak 391 S Shore Dr 216, Battle Creek 49015 | (269) 969-6294 |