I16.1 Hypertensive emergency

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

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)

Applies from I16 Hypertensive crisis

Code also

• any identified hypertensive disease (I10-I15, I1A)

Risk adjustment (HCC)

• RxHCC V08: HCC 187 — Hypertension

MS-DRG index

Defines the logic of DRG(s) 304-305 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 401.9 Unspecified essential hypertension (approximate)

Code annotations containing back-references to I16.1

Back-references to I16.1

• Code Also: D59.39 Other hemolytic-uremic syndrome ("hypertensive emergency (I16.1)")

Back-references to I16

• Use Additional: G90.81 Serotonin syndrome ("hypertensive crisis (I16.-)")

Diagnosis Index entries for I16.1

• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › emergency

Nearby codes

• I16 Hypertensive crisis
• I16.0 Hypertensive urgency
• I16.1 Hypertensive emergency (this code)
• I16.9 Hypertensive crisis, unspecified