2025 ICD-10-CM Diagnosis Code I27.29

Other secondary pulmonary hypertension

• I27.29 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 I27.29 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I27.29 – other international versions of ICD-10 I27.29 may differ.

Applicable To

• Group 5 pulmonary hypertension
• Pulmonary hypertension with unclear multifactorial mechanisms
• Pulmonary hypertension due to hematologic disorders
• Pulmonary hypertension due to metabolic disorders
• Pulmonary hypertension due to other systemic disorders

Code Also

• other associated disorders, if known, such as:
• chronic myeloid leukemia (C92.10-C92.22)
• essential thrombocythemia (D47.3)
• Gaucher disease (E75.22)
• hypertensive chronic kidney disease with end stage renal disease (I12.0, I13.11, I13.2)
• hyperthyroidism (E05.-)
• hypothyroidism (E00–E03)
• polycythemia vera (D45)
• sarcoidosis (D86.-)

The following code(s) above I27.29 contain annotation back-references

 that may be applicable to I27.29:

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

ICD-10-CM I27.29 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 I27.29 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

Code annotations containing back-references to I27.29:

• Type 1 Excludes: I27.0

Diagnosis Index entries containing back-references to I27.29:

• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
  • pulmonaryI27.20
    • with
      • cor pulmonale (chronic) I27.29
      • right heart ventricular strain/failure I27.29
      • unclear multifactorial mechanisms I27.29
    • due to
      • hematologic disorders I27.29
      • metabolic disorders I27.29
      • specified systemic disorders NEC I27.29
    • secondary
      • specified NEC I27.29
    • group 5 I27.29