Which option is TRUE regarding reporting codes for cytomegaloviral pneumonitis in ICD-10-CM?
a. Only the pneumonia is reported, it is not necessary to report the underlying diseases.
b. Pneumonia is reported first; the underlying disease is reported second.
c. One code is used to report both the pneumonia and the cytomegaloviral disease.
d. The underlying disease is reported first; pneumonia is reported second.