766 Disorders relating to long gestation and high birthweight convert 766 to ICD-10
766.0 Exceptionally large baby convert 766.0 to ICD-10
766.1 Other "heavy-for-dates" infants convert 766.1 to ICD-10
766.2 Late infant, not 'heavy-for-dates' convert 766.2 to ICD-10

766.21 Post-term infant convert 766.21 to ICD-10

766.22 Prolonged gestation of infant convert 766.22 to ICD-10