ICD-10 Code I16.9 – Hypertensive Crisis, Unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I16.9 – Hypertensive crisis, unspecified
What it is
I16.9 identifies a hypertensive crisis when the record does not specify the type. It indicates a severe blood pressure-related emergency or urgency, but the documentation does not clarify whether there is acute target-organ damage.
Clinical signs
Clinical features vary; refer to documentation. Commonly, the record describes markedly elevated blood pressure with symptoms such as headache, chest pain, shortness of breath, neurologic changes, or visual disturbance if present.
When to use this code
Use I16.9 when the clinician documents hypertensive crisis and does not specify whether it is emergency or urgency. It also fits when the note confirms a crisis but gives no further detail. Check documentation for any associated acute organ damage or a more specific hypertension code.
Do not use for
Do not use this code for routine hypertension, elevated blood pressure without a crisis, or a clearly documented hypertensive emergency or urgency with a more specific code. Check documentation if another hypertensive diagnosis is stated.
Coding tip
Assign I16.9 only when “hypertensive crisis” is documented and no more specific crisis type is recorded.