I16.1 – Hypertensive emergency

ICD-10-CM 2027 diagnosis code · Hypertensive diseases

Billable code

ICD-10-CM code I16.1
Code
I16.1 (claims format: I161)
Description
Hypertensive emergency
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
9. Diseases of the circulatory system (I00-I99)
Block
I10-I1A Hypertensive diseases
Parent codes
I16

Notes for I16.1

Code also:
  • , 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)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I16 – Hypertensive crisis

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

Block I10-I1A

Excludes1 (not coded here):
  • neonatal hypertension (P29.2)
  • primary pulmonary hypertension (I27.0)
Excludes2 (not included here):
  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
Use additional code:
  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Index terms for I16.1

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I16

Frequently asked questions

What is ICD-10 code I16.1?

I16.1 is the ICD-10-CM code for hypertensive emergency, in the block I10-I1A (Hypertensive diseases).

Is I16.1 a billable code?

Yes. I16.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I16.1 belong to?

It belongs to category I16 – Hypertensive crisis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.