1. ICD-10-CM Codes
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2. I00-I99
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3. I26-I28
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4. I27-
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5. 2023 ICD-10-CM Diagnosis Code I27.21

2023 ICD-10-CM Diagnosis Code I27.21

Secondary pulmonary arterial hypertension

2018 - New Code 2019 2020 2021 2022 2023 Billable/Specific Code

• I27.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM I27.21 became effective on October 1, 2022.
• This is the American ICD-10-CM version of I27.21 - other international versions of ICD-10 I27.21 may differ.

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

Convert I27.21 to ICD-9-CM

• 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

• Code Also: M34.81
  ICD-10-CM Diagnosis Code M34.81

  Systemic sclerosis with lung involvement

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Code Also

  • if applicable:
  • other interstitial pulmonary diseases (J84.89)
  • secondary pulmonary arterial hypertension (I27.21)
• Type 1 Excludes: I27.0
  ICD-10-CM Diagnosis Code I27.0

  Primary pulmonary hypertension

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Heritable pulmonary arterial hypertension
  • Idiopathic pulmonary arterial hypertension
  • Primary group 1 pulmonary hypertension
  • Primary pulmonary arterial hypertension

  Type 1 Excludes

  • persistent pulmonary hypertension of newborn (P29.30)
  • pulmonary hypertension NOS (I27.20)
  • secondary pulmonary arterial hypertension (I27.21)
  • secondary pulmonary hypertension (I27.29)

• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
  ICD-10-CM Diagnosis Code I10

  Essential (primary) hypertension

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Questionable As Admission Dx

  Includes

  • high blood pressure
  • hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)

  Type 1 Excludes

  • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)

  Type 2 Excludes

  • essential (primary) hypertension involving vessels of brain (I60-I69)
  • essential (primary) hypertension involving vessels of eye (H35.0-)
  • pulmonary I27.20
    ICD-10-CM Diagnosis Code I27.20

    Pulmonary hypertension, unspecified

    2018 - New Code 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Pulmonary hypertension NOS
    • secondary
      • arterial I27.21
    • arterial I27.21 (associated) (drug-induced) (toxin-induced)
    • group 1 I27.21 (associated) (drug-induced) (toxin-induced)

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.