Hypertensive emergency

**Use additional code:** - code, if applicable, to identify specific organ dysfunction, such as: - acute kidney injury (N17.-) - acute myocardial infarction (I21.-) - acute pulmonary edema (left and/or right ventricular failure) (J81.0, I50.-) - aortic dissection (I71.0-) - cerebral hemorrhage (I60.-. I61.-, I62.-) - cerebral infarction (I63.-) - eclampsia (O15.-) - hypertensive encephalopathy (I67.4) - seizure (R56.9)