| Business | Phone |
| Grayson Imaging Center 2916 N Us Highway 75 Fwy, Sherman 75090 | (903) 870-1778 |
| Texoma Sleep Diagnostics 1422 W Houston St, Sherman 75092 | (903) 813-0300 |
| Quest Diagnostics Inc 1010 La Salle Dr # 2eb, Sherman 75090 | (903) 813-5625 |
| Laboratory Corp Of America 2001 N Loy Lake Rd # M, Sherman 75090 | (903) 893-4792 |
| Laboratory Corp Of America 425 N Highland Ave, Sherman 75092 | (903) 891-1875 |
| Laboratory Corp Of America 806 E Pecan Grove Rd, Sherman 75090 | (903) 870-0187 |
| Laboratory Corp Of America 913 Cottonwood Dr, Sherman 75090 | (903) 893-1430 |