| Business | Phone |
| Health Care Horizons 5850 Waterloo Rd # 140, Columbia 21045 | (410) 715-9710 |
| International Child Health 10630 Little Patuxent Pkwy, Columbia 21044 | (410) 992-5512 |
| Managed Health Care Ltd 6140 Scarborough Way, Columbia 21044 | (410) 992-1443 |
| Med Star Health 5565 Sterrett Pl, Columbia 21044 | (301) 912-6500 |