2025 ICD-10-CM Diagnosis Code I27.23

Pulmonary hypertension due to lung diseases and hypoxia

• I27.23 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2025 edition of ICD-10-CM I27.23 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I27.23 – other international versions of ICD-10 I27.23 may differ.

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-)

The following code(s) above I27.23 contain annotation back-references

 that may be applicable to I27.23:

• I00-I99  Diseases of the circulatory system
• I27.2  Other secondary pulmonary hypertension

ICD-10-CM I27.23 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 314 Other circulatory system diagnoses with mcc
• 315 Other circulatory system diagnoses with cc
• 316 Other circulatory system diagnoses without cc/mcc

Convert I27.23 to ICD-9-CMCode History

• 2018 (effective 10/1/2017): New code
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change
• 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I27.23:

• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
  • pulmonaryI27.20
    • due to
      • lung diseases and hypoxia I27.23
    • group 3 I27.23