I16.1

HCC Category Mapping

What This Code Means

A life-threatening spike in blood pressure with evidence of acute organ damage, such as stroke, heart attack, or kidney failure.

Coding Tips

• •Always code the associated end-organ damage (e.g., acute coronary syndrome, acute kidney injury) as additional diagnoses
• •This code indicates a true medical emergency requiring immediate intervention

Clinical Significance

Hypertensive emergency is a life-threatening condition with severely elevated blood pressure AND acute target organ damage, which may include hypertensive encephalopathy, acute heart failure, acute coronary syndrome, acute renal failure, or aortic dissection. This requires immediate parenteral antihypertensive therapy and intensive care management, reflecting extremely high clinical acuity.

Documentation Requirements

• ✓Severely elevated blood pressure reading documented
• ✓Provider diagnosis of hypertensive emergency
• ✓Documentation of acute target organ damage — specify which organ(s) are affected
• ✓Type of organ damage: encephalopathy, acute HF, acute MI, acute renal failure, retinopathy, aortic dissection, etc.
• ✓Treatment with intravenous antihypertensives documented
• ✓ICU or monitored bed admission documentation
• ✓Additional codes for the specific organ damage should be assigned
• ✓Underlying hypertension diagnosis should also be coded

Commonly Confused Codes