I27.23

Billable

ChapterI00–I99

Ranksubcategory

Official Description

Pulmonary hypertension due to lung diseases and hypoxia

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).

Instructional Notes

Includes

Group 3 pulmonary hypertension

Code Also

associated lung disease, if known, such as:
bronchiectasis (J47.-)
cystic fibrosis with pulmonary manifestations (E84.0)
interstitial lung disease (J84.-)
pleural effusion (J90)
sleep apnea (G47.3-)

General instructions are available for the parent sections:

View CH9 Notes View I27.2 Notes

Clinical Hierarchy

CH9Diseases of the circulatory system (I00-I99)

I26-I28Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)

I27Other pulmonary heart diseases

I27.2Other secondary pulmonary hypertension

I27.23Pulmonary hypertension due to lung diseases and hypoxia

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I27.23:

subcategoryI27.2

Other secondary pulmonary hypertension

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 I27.23. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)2 unique routes

pulmonary(2 variants)

due to

lung diseases and hypoxia→I27.23

group 3→I27.23

MS-DRG Classification

2026 v43.1

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

DRG 314

Other Circulatory System Diagnoses with MCC

DRG 315

Other Circulatory System Diagnoses with CC

DRG 316

Other Circulatory System Diagnoses without CC/MCC

Cross Reference

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