I27.23 – Pulmonary hypertension due to lung diseases and hypoxia

ICD-10-CM 2027 diagnosis code · Pulmonary heart disease and diseases of pulmonary circulation

Billable code

ICD-10-CM code I27.23

Code: I27.23 (claims format: I2723)
Description: Pulmonary hypertension due to lung diseases and hypoxia
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: I26-I28 Pulmonary heart disease and diseases of pulmonary circulation
Parent codes: I27 › I27.2

Notes for I27.23

Applicable to:

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-)

Notes inherited from parent codes

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

I27.2 – Other secondary pulmonary hypertension

Excludes1 (not coded here):

Eisenmenger's syndrome (I27.83)

Code also:

associated underlying condition

Index terms for I27.23

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

Related codes in I27.2

Frequently asked questions

What is ICD-10 code I27.23?

I27.23 is the ICD-10-CM code for pulmonary hypertension due to lung diseases and hypoxia, in the block I26-I28 (Pulmonary heart disease and diseases of pulmonary circulation).

Is I27.23 a billable code?

Yes. I27.23 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I27.23 belong to?

It belongs to category I27 – Other pulmonary heart diseases.

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.