Transitory tyrosinemia of newborn

This code represents a temporary metabolic disorder in newborns characterized by elevated tyrosine levels in the blood. It is typically benign and resolves spontaneously without specific treatment, often due to delayed maturation of liver enzymes responsible for tyrosine metabolism.

Use this code for newborns diagnosed with transient hypertyrosinemia identified through newborn screening or subsequent laboratory testing. Documentation should confirm elevated tyrosine levels and rule out other causes of hypertyrosinemia, such as hereditary tyrosinemia types.

• Ensure documentation specifies "transitory" or "transient" to differentiate from permanent forms of tyrosinemia.
• Do not use this code for confirmed hereditary tyrosinemia; those conditions have specific codes within the E70 category.
• Consider sequencing this code as a secondary diagnosis if another condition is the primary reason for admission or encounter.