What Q42 covers · when clinicians use it
ICD-10 code Q42 identifies Congenital absence, atresia and stenosis of large intestine in the U.S. ICD-10-CM clinical and billing record set. It sits within the Congenital Malformations chapter (Q00–Q99), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply Q42 when an encounter's findings match the Congenital absence, atresia and stenosis of large intestine description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify Q42 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for Q42 and is a coding reference, not clinical, diagnostic, or billing advice.
Q42 refers to Congenital absence, atresia and stenosis of large intestine, covering congenital defects affecting the mouth, esophagus, intestines, gallbladder, bile ducts, and liver that can impact digestion and nutrient absorption.
Symptoms
- Feeding difficulties – Especially in esophageal atresia (Q39)
- Vomiting and abdominal swelling – Due to intestinal blockages (Q41–Q42)
- Jaundice – Common with bile duct malformations (Q44)
- Swallowing or breathing issues – Related to mouth or pharyngeal anomalies (Q38)
- Growth retardation – Due to malabsorption or obstruction (Q43–Q45)
Diagnosis
Diagnosis typically involves prenatal imaging like ultrasound, postnatal physical examination, contrast studies (e.g., barium swallow), and sometimes surgical exploration for digestive system anomalies.
ICD10 Code Usage
ICD10 code Q42 is used to document congenital digestive defects for EHRs, surgical planning, medical coding, and early nutritional support programs.
Related Codes
- Q38 – Other congenital malformations of tongue, mouth and pharynx
- Q39 – Congenital malformations of esophagus
- Q40 – Other congenital malformations of upper alimentary tract
- Q41 – Congenital absence, atresia and stenosis of small intestine
- Q43 – Other congenital malformations of intestine
- Q44 – Congenital malformations of gallbladder, bile ducts and liver
- Q45 – Other congenital malformations of digestive system
FAQs
Q1: What is ICD10 code Q42?
A: It is used to document Congenital absence, atresia and stenosis of large intestine affecting the digestive tract or accessory organs.
Q2: Are congenital digestive anomalies life-threatening?
A: Some can be life-threatening without timely surgical or medical treatment.
Q3: How is esophageal atresia managed?
A: Surgical correction is typically performed soon after birth to restore feeding ability.
Q4: What is biliary atresia?
A: A blockage in the bile ducts that requires surgical intervention to prevent liver damage.
Q5: Can these conditions be detected before birth?
A: Yes, many major malformations are suspected during detailed prenatal ultrasound evaluations.
Conclusion
ICD10 code Q42 ensures accurate recording of Congenital absence, atresia and stenosis of large intestine, helping in early interventions, medical care coordination, and long-term digestive health outcomes for affected newborns.