Congenital malformation of great arteries, unspecified

This code signifies a birth defect affecting the major arteries originating from the heart, where the specific type of malformation is not documented or cannot be determined. It indicates an abnormality in the development of vessels like the aorta or pulmonary artery.

Use this code when the medical record clearly states a congenital malformation of the great arteries but lacks further specificity regarding the exact nature of the defect. This is appropriate when documentation only mentions "congenital great artery anomaly, type unknown" or similar vague descriptions.

• Avoid using this code if more specific documentation is available; always query for greater detail if possible.
• Do not confuse this with acquired conditions of the great arteries; this code is strictly for congenital defects.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity.