In simple words: This code describes a condition where a baby is affected by diabetes that the mother developed during pregnancy (gestational diabetes). It is different from a baby affected by a mother who had diabetes before pregnancy.

Syndrome of infant of mother with gestational diabetes. This condition describes a newborn affected by maternal gestational diabetes and excludes newborn affected by maternal pre-existing diabetes mellitus (P70.1).

Example 1: A newborn infant exhibits hypoglycemia, macrosomia, and respiratory distress shortly after birth. The mother was diagnosed with gestational diabetes during pregnancy. P70.0 is assigned., An infant born to a mother with gestational diabetes is asymptomatic but undergoes close monitoring for hypoglycemia.If hypoglycemia develops, P70.0 would be appropriate. If the infant remains asymptomatic and no effects are documented, assign Z03.79 instead., A baby is born with macrosomia. The mother has pre-existing type 2 diabetes.P70.1 (Syndrome of infant of a diabetic mother) is the correct code, not P70.0.

Documentation should include maternal history of gestational diabetes, the infant's clinical findings (e.g., hypoglycemia, respiratory distress, macrosomia, unstable blood sugars), and any treatment provided.