Which of the following neurotransmitters is classified as a catecholamine??

The abbreviation NEC is used in the ICD-9-CM to indicate:

A) additional details are in the medical record, but there is not a more specific code available. B) sequencing instructions for conditions and codes that have sequencing requirements. C) information to assign a more specific code is not available in the medical record. D) a reference to another main term or condition is needed to locate the correct code.

Which of the following is a common mixture for carbon dioxide/oxygen therapy?

A) 5%/95% B) 20%/80% C) 30%/70% D) none of the above