ICD-10-CM Diagnosis Code (2025)
Official Description for I27.21
Secondary pulmonary arterial hypertension
Coding Notes & Guidelines for I27.21
Inclusion Terms
- (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.-)
Parent Code (Less Specific):
About ICD-10-CM Code I27.21 (Secondary pulmonary arterial hypertension)
ICD-10-CM code I27.21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I27.21 became effective on October 1, 2024.
This page provides detailed information about I27.21 - Secondary pulmonary arterial hypertension. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Secondary pulmonary arterial hypertension.