How much does a cubic foot of water weigh?

What is the most important noninvasive diagnostic test for evaluation of a patient with idiopathic pulmonary artery hypertension (IPAH)?

a. Posteroanterior chest radiograph b. Physical examination c. Pulmonary function testing d. scan

The modifier -52 is used to indicate:

A) prolonged evaluation and management (E/M) service. B) unrelated E/M service by the same physician during a postoperative period. C) significant, separately identifiable E/M service by the same physician on the same day of the procedure or other service. D) reduced services.