Question: Illinois Subscriber Answer: • 779.31 (Feeding problems in newborn): Feeding problems may be from underfeeding or overfeeding or trouble with feedings, such as spitting or gagging. Underfeeding results from the infant's failure to take sufficient amounts of milk. Pediatricians often spot this problem when the newborn fails to gain weight appropriate for this age or when the mother notices that the newborn suckles infrequently or for only short periods of time. • 779.32 (Bilious vomiting in newborn): Bilious vomiting is vomiting of gastric contents containing bile, often described as greenish vomitus. • 779.33 (Other vomiting in newborn): Vomiting is the complete emptying of the stomach contents often occurring after feeding. • 779.34 (Failure to thrive in newborn): Reflected in how the newborn gains or loses weight in relation to his birth or recent weights. Beware: