ICD-10 Code I16 – Hypertensive Crisis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I16 – Hypertensive crisis
What it is
I16 identifies a hypertensive crisis, a severe and sudden elevation of blood pressure that requires urgent clinical attention. It covers crisis presentations without specifying the exact cause or complications.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with markedly elevated blood pressure and symptoms such as headache, chest discomfort, shortness of breath, or neurologic complaints.
When to use this code
Use I16 when the record documents a hypertensive crisis or urgency/emergency as the reason for evaluation. Code it when the provider identifies the event as a crisis, even if the note does not describe a separate complication. Check documentation if the chart only shows elevated blood pressure without crisis language.
Do not use for
Do not use I16 for routine hypertension or isolated elevated readings without a crisis diagnosis. If the record documents a specific hypertensive complication, code the complication instead.
Coding tip
Look for explicit provider wording such as “hypertensive crisis” before assigning I16.