I27.21

Billable

Secondary pulmonary arterial hypertension

I27.21 is the ICD-10-CM code for Secondary pulmonary arterial hypertension. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
I00-I99
Parent
I27.2
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

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

Notes

  • 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.-)

Frequently asked questions

What is ICD-10 code I27.21?
I27.21 is the ICD-10-CM code for "Secondary pulmonary arterial hypertension". It falls under I00-I99 Diseases of the circulatory system.
Is I27.21 a billable code?
Yes — I27.21 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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