The external cause of morbidity codes can be used with any of the other codes from the A00.0-T88.9 and Z00-Z99 classification that is a health condition due to an external cause.

Nosocomial transmission of tuberculosis (TB) can be prevented by

a. using antimycobacterial agents. b. placing patients in respiratory isolation. c. treating patients with penicillin. d. having patients wear masks.

The proportion of hemosiderin to ferritin increases when:

a. Iron stores increase. b. Anemia is present. c. Transferrin increases. d. Erythropoietin increases.