- Global Headquarters
- 4436 Broadmoor SE
- Kentwood, MI 49512 USA
- tel: 616 541 8080
- toll free: 877 MED 8080 or
- toll free: 877 633 8080
- fax: 616 698 6876
- 24 Aldrin Road
- Plymouth, MA 02360 USA
- tel: 508 830 1442
- fax: 508 830 1033
- 31069 Genstar Road
- Hayward, CA 94544 USA
- tel: 510 487 7600
- fax: 510 487 7900
- 3839 East Paris Avenue, SE
- Kentwood, MI 49512 USA
- tel: 616 698 0707
- fax: 616 698 6876