potassium level mean bilirubin level MeanAirwayPressure hgb chloride TidalVolume(observed) peep Aspirin MinuteVolumeAlarm-High Packed Red Blood Cells Table 2. 50 Most Common ICD-9 Code Descriptions. ICD9 CodeCountShort NameLong NameType 4019 15030 Hypertension NOS Unspecified essential hypertension Diag...