Short answer · Medically reviewed summary · Last updated: 2026-05-08
The ICD-10-CM code for Truncus Arteriosus is Q20.0, while the historical ICD-9-CM code is 745.0. Both codes are used by healthcare providers and insurance systems to specifically identify this rare congenital heart defect where a single blood vessel exits the heart instead of the normal two. What exactly is Truncus Arteriosus? Truncus Arteriosus is a rare, life-threatening congenital heart defect characterized by the failure of the embryonic truncus arteriosus to divide into the aorta and the pulmonary artery.
ICD10 code of Truncus Arteriosus and ICD9 code
ICD-10 and ICD-9 codes for Truncus Arteriosus, with classification details for clinicians, coders and patients.
The ICD-10-CM code for Truncus Arteriosus is Q20.0, while the historical ICD-9-CM code is 745.0. Both codes are used by healthcare providers and insurance systems to specifically identify this rare congenital heart defect where a single blood vessel exits the heart instead of the normal two.
What exactly is Truncus Arteriosus?
Truncus Arteriosus is a rare, life-threatening congenital heart defect characterized by the failure of the embryonic truncus arteriosus to divide into the aorta and the pulmonary artery. This results in a single large vessel arising from the heart that supplies blood to the body, lungs, and coronary arteries. Because this condition causes significant mixing of oxygen-rich and oxygen-poor blood, it requires surgical intervention, typically within the first few weeks of life, to separate the circulation pathways.
How is Truncus Arteriosus diagnosed and classified?
Diagnosis of Truncus Arteriosus often occurs via fetal echocardiogram or shortly after birth when clinical symptoms like cyanosis (bluish skin) or heart murmurs appear. Clinicians utilize the Collett-Edwards classification system to categorize the defect based on how the pulmonary arteries branch from the common trunk. Accurate coding with Q20.0 is essential for clinical documentation and long-term monitoring within the Truncus Arteriosus patient community.
What are the clinical considerations for families?
Managing Truncus Arteriosus involves a multidisciplinary team, including pediatric cardiologists and cardiovascular surgeons. Patients often require multiple interventions over their lifetime as they outgrow initial repairs or as valve complications arise. Our DiseaseMaps.org community currently includes 105 individuals sharing their personal experiences with this journey, providing a unique repository of peer-to-peer support for those navigating the complexities of Truncus Arteriosus.
- ICD-10-CM Code: Q20.0 (Common arterial trunk)
- ICD-9-CM Code: 745.0 (Common truncus)
- Prevalence: Estimates suggest it accounts for approximately 1% of all congenital heart defects.
- Genetic association: Roughly 30-40% of cases are associated with 22q11.2 deletion syndrome (DiGeorge syndrome).
Next steps
- Consult with a board-certified pediatric cardiologist to discuss long-term surveillance protocols.
- Connect with the 105 members of the Truncus Arteriosus community at DiseaseMaps.org to share resources and experiences.
- Review your child’s medical records to ensure the correct ICD-10 code (Q20.0) is utilized for insurance and specialized care coordination.
Medical disclaimer: This information is for educational purposes only and does not replace professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Truncus Arteriosus
- Orphanet: Common Arterial Trunk (ORPHA:833)
- OMIM (Online Mendelian Inheritance in Man): Truncus Arteriosus, Persistent
- American Heart Association: Congenital Heart Defects
