Bilious vomiting of newborn

This code describes the presence of green or yellow-green emesis in a neonate, indicating the reflux of bile into the stomach and esophagus. This symptom is a critical sign in newborns, often suggesting an underlying gastrointestinal obstruction or other serious pathology requiring immediate investigation.

Assign this code when documentation explicitly states "bilious vomiting" in a newborn from birth up to and including 28 days of age. This symptom warrants urgent medical evaluation and is typically documented in emergency department notes, inpatient admission records, or pediatric consultations.

• Ensure the patient's age is within the neonatal period (0-28 days) to correctly apply this code.
• Do not use this code if the patient is older than 28 days; refer to R11.14 for bilious vomiting in older infants/children.
• Always code the underlying cause of the bilious vomiting, if known, as the primary diagnosis, with this code as a secondary diagnosis.