ICD-10-CM Book 2026 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 9 I00-I99 Diseases of the circulatory system /
I26-I28 Pulmonary heart disease and diseases of pulmonary circulation /
I27 Other pulmonary heart diseases

  Billable ICD-10-CM Code I27.21
I27.21
Secondary pulmonary arterial hypertension
(Associated) (drug-induced) (toxin-induced) pulmonary arterial hypertension NOS
(Associated) (drug-induced) (toxin-induced) (secondary) group 1 pulmonary hypertension
codeAlso
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.-)