I27.21: Secondary pulmonary arterial hypertension

I27.21 is a billable/specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Secondary pulmonary arterial hypertension.

Inclusion term

Associated) (drug-induced) (toxin-induced) pulmonary arterial hypertension NOS
(Associated) (drug-induced) (toxin-induced) (secondary) group 1 pulmonary hypertension

Code also

Associated conditions if applicable, or adverse effects of drugs or toxins, such as:

Adverse effect of appetite depressants (T50.5X5)
Congenital heart disease (Q20-Q28)
Human immunodeficiency virus [HIV] disease (B20)
Polymyositis (M33.2-)
Portal hypertension (K76.6)
Rheumatoid arthritis (M05.-)
Schistosomiasis (B65.-)
Sjögren syndrome (M35.0-)
Systemic sclerosis (M34.-)

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Versions

2026
Code changed
- Code also
  ~~associated conditions if applicable, or adverse effects of drugs or toxins, such as:~~
  ~~adverse effect of appetite depressants (T50.5X5)~~
  ~~congenital heart disease (Q20-Q28)~~
  ~~human immunodeficiency virus [HIV] disease (B20)~~
  ~~polymyositis (M33.2-)~~
  ~~portal hypertension (K76.6)~~
  ~~rheumatoid arthritis (M05.-)~~
  ~~schistosomiasis (B65.-)~~
  ~~Sju00f6gren syndrome (M35.0-)~~
  ~~systemic sclerosis (M34.-)~~
  associated conditions if applicable, or adverse effects of drugs or toxins, such as:
  adverse effect of appetite depressants (T50.5X5)
  congenital heart disease (Q20-Q28)
  human immunodeficiency virus [HIV] disease (B20)
  polymyositis (M33.2-)
  portal hypertension (K76.6)
  rheumatoid arthritis (M05.-)
  schistosomiasis (B65.-)
  Sjögren syndrome (M35.0-)
  systemic sclerosis (M34.-)
2025
Code changed
- Code also
  ~~associated conditions if applicable, or adverse effects of drugs or toxins, such as:~~
  ~~adverse effect of appetite depressants (T50.5X5)~~
  ~~congenital heart disease (Q20-Q28)~~
  ~~human immunodeficiency virus [HIV] disease (B20)~~
  ~~polymyositis (M33.2-)~~
  ~~portal hypertension (K76.6)~~
  ~~rheumatoid arthritis (M05.-)~~
  ~~schistosomiasis (B65.-)~~
  ~~Sjögren syndrome (M35.0-)~~
  ~~systemic sclerosis (M34.-)~~
  associated conditions if applicable, or adverse effects of drugs or toxins, such as:
  adverse effect of appetite depressants (T50.5X5)
  congenital heart disease (Q20-Q28)
  human immunodeficiency virus [HIV] disease (B20)
  polymyositis (M33.2-)
  portal hypertension (K76.6)
  rheumatoid arthritis (M05.-)
  schistosomiasis (B65.-)
  Sju00f6gren syndrome (M35.0-)
  systemic sclerosis (M34.-)
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
New code

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Inclusion term

Code also

Versions

2026

Code also

2025

Code also

2024

2023

2022

2021

2020

2019

2018

Inclusion term

Code also

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2026

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2025

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2024

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2018