| Business | Phone |
| Medi-Center Laboratories Inc 500 N Rolling Rd, Catonsville 21228 | (410) 788-8833 |
| Quest Diagnostics Inc 724 Maiden Choice Ln # 101, Catonsville 21228 | (410) 788-1388 |
| Bio-Analytical Laboratories 405 Frederick Rd, Catonsville 21228 | (410) 747-2306 |
| Citrano Medical Laboratories 413 Commonwealth Ave # A, Catonsville 21228 | (410) 744-2899 |
| St Agnes Cardiac Diagnostic 724 Maiden Choice Ln # 202, Catonsville 21228 | (410) 455-0200 |
| St Agnes Nuclear Imaging 724 Maiden Choice Ln # 202, Catonsville 21228 | (410) 747-3300 |