I16.9

Billable
ChapterI00–I99
Ranksubcategory
Official Description

Hypertensive crisis, unspecified

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 9: Diseases of the Circulatory System (I00-I99).
General instructions are available for the parent sections:
View CH9 NotesView I10-I1A NotesView I16 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)
I10-I1AHypertensive diseases (I10-I1A)
I16Hypertensive crisis
I16.9Hypertensive crisis, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I16.9:

categoryI16
Hypertensive crisis
View context instructions
blockI10-I1A
Hypertensive diseases (I10-I1A)
View context instructions
chapterCH9
Diseases of the circulatory system (I00-I99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to I16.9. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

1 raw paths
Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)1 unique routes
crisis→I16.9

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 304
Hypertension with MCC
DRG 305
Hypertension without MCC

Cross Reference

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