| Business | Phone |
| Anchor Family Health Ctr 2800 4th St Sw 8, Mason City 50401 | (641) 424-0000 |
| Michael A Blackmore Md 20 5th St Nw, Mason City 50401 | (641) 422-9000 |
| Broman & Jenkins 20 5th St Nw, Mason City 50401 | (641) 494-2464 |
| Michael C Geis Md 1000 4th St Sw, Mason City 50401 | (641) 422-7719 |
| Stephanie C Seemuth Do 1327 6th St Sw, Mason City 50401 | (641) 423-0711 |
| David Little Md 1000 4th St Sw, Mason City 50401 | (641) 422-7085 |
| Mason City Clinic Imaging Svc 520 S Pierce Ave 100, Mason City 50401 | (641) 422-6767 |
| Mason City Clinic Neurology 250 S Crescent Dr, Mason City 50401 | (641) 422-6760 |
| Mercy Cancer Ctr 1000 4th St Sw, Mason City 50401 | (641) 422-6320 |
| Mercy Dermatology 1000 4th St Sw, Mason City 50401 | (641) 422-6610 |
| Mercy Internal Med 100 4th St, Mason City 50401 | (641) 422-6999 |
| Mercy Medical Of North Iowa 1000 4th St Sw, Mason City 50401 | (641) 422-7234 |
| Mercy Pediatric & Adolescent 910 N Eisenhower Ave, Mason City 50401 | (641) 422-5437 |
| Mercy Neurosicence Ctr 1000 4th St Sw, Mason City 50401 | (641) 422-7728 |
| Mercy Vascular Ctr 1000 4th St Sw, Mason City 50401 | (641) 422-5177 |
| North Iowa Anesthesia Assoc 1000 4th St Sw, Mason City 50401 | (641) 424-6704 |
| North Iowa Anesthesia Assoc 1410 6th St Sw, Mason City 50401 | (641) 424-6704 |
| North Iowa Eye Clinic Pc 3121 4th St Sw, Mason City 50401 | (641) 423-8861 |
| Pathology Associates-Mason Cty 1000 4th St Sw, Mason City 50401 | (641) 422-7862 |
| Mercy Pediatric & Adolescent 1000 4th St Sw, Mason City 50401 | (641) 422-7000 |
| Radiologists Of North Iowa 1010 4th St Sw 100, Mason City 50401 | (641) 424-4932 |
| Radiologists Of North Iowa 1416 6th St Sw, Mason City 50401 | (641) 424-0102 |