Condition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).ondition Description. Truncus arteriosus is an uncommon congenital heart defect where a baby is born with a single blood vessel (called a truncus) coming from the main pumping chambers of the heart (the ventricles) instead of two vessels (one from each ventricle).
IRS Office Customer Service Phone Number Phone Number: 1 (800) 829-1040. Shortcut: N/A - Edit
A: The Internal Revenue Service's assistance number for individual taxpayers is 800-829-1040, and for businesses it is 800-829-4933. Other customer service numbers are as follows: for exempt organizations, retirement plan administrators, and government entities, 877-829-5500, and for the hearing-impaired, 800-829-4933.