ICD-10 Diagnosis Code Q42.9

Congen absence, atresia and stenosis of lg int, part unsp

Diagnosis Code Q42.9

ICD-10: Q42.9
Short Description: Congen absence, atresia and stenosis of lg int, part unsp
Long Description: Congenital absence, atresia and stenosis of large intestine, part unspecified
This is the 2017 version of the ICD-10-CM diagnosis code Q42.9

Code Classification
  • Congenital malformations, deformations and chromosomal abnormalities
    • Other congenital malformations of the digestive system (Q38-Q45)
      • Congenital absence, atresia and stenosis of large intestine (Q42)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code Q42.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

Present on Admission (POA) Additional informationCallout TooltipPresent on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

The code Q42.9 is exempt from POA reporting.

  • Atresia and stenosis of large intestine, rectum and anal canal
  • Atresia of large intestine
  • Congenital absence of intestinal tract
  • Congenital absence of large intestine
  • Congenital atresia of colon
  • Congenital obstruction of large intestine
  • Congenital stenosis of colon
  • Imperforate large intestine
  • Obstruction of colon
  • Stenosis of colon

Information for Patients

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

A birth defect may affect how the body looks, works or both. Some birth defects like cleft lip or neural tube defects are structural problems that can be easy to see. To find others, like heart defects, doctors use special tests. Birth defects can vary from mild to severe. Some result from exposures to medicines or chemicals. For example, alcohol abuse can cause fetal alcohol syndrome. Infections during pregnancy can also result in birth defects. For most birth defects, the cause is unknown.

Some birth defects can be prevented. Taking folic acid can help prevent some birth defects. Talk to your doctor about any medicines you take. Some medicines can cause serious birth defects.

Babies with birth defects may need surgery or other medical treatments. Today, doctors can diagnose many birth defects in the womb. This enables them to treat or even correct some problems before the baby is born.

Centers for Disease Control and Prevention

  • Intersex

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Colonic Diseases

Also called: Large intestine diseases

Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include

  • Colorectal cancer
  • Colonic polyps - extra tissue growing in the colon that can become cancerous
  • Ulcerative colitis - ulcers of the colon and rectum
  • Diverticulitis - inflammation or infection of pouches in the colon
  • Irritable bowel syndrome - an uncomfortable condition causing abdominal cramping and other symptoms

Treatment for colonic diseases varies greatly depending on the disease and its severity. Treatment may involve diet, medicines and in some cases, surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Angiodysplasia of the colon
  • Colitis
  • Colonoscopy
  • Hirschsprung disease
  • Intestinal ischemia and infarction
  • Large bowel resection
  • Lower GI Series - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)

[Read More]
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