ICD-10 Diagnosis Code Q89.4

Conjoined twins

Diagnosis Code Q89.4

ICD-10: Q89.4
Short Description: Conjoined twins
Long Description: Conjoined twins
This is the 2018 version of the ICD-10-CM diagnosis code Q89.4

Valid for Submission
The code Q89.4 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • Other congenital malformations (Q80-Q89)
      • Other congenital malformations, not elsewhere classified (Q89)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code Q89.4 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


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 Q89.4 is exempt from POA reporting.

  • Anadidymus
  • Anakatadidymus
  • Asymmetrical conjoined twins
  • Cephalodymus
  • Cephalothoracopagus
  • Compound monster
  • Compound monster
  • Conjoined twins
  • Cranial duplication
  • Craniopagus
  • Craniopagus frontalis
  • Craniopagus occipitalis
  • Craniopagus parasiticus
  • Craniopagus parietalis
  • Deradelphus
  • Derodidymis
  • Desmiognathus
  • Diaxial
  • Dicephalic parapagus
  • Dicephalus dipus dibrachius
  • Dicephalus dipus tetrabrachius
  • Dicephalus dipus tribrachius
  • Dicephalus tripus tribrachius
  • Diprosopus
  • Dipygus
  • Dithoracic parapagus
  • Double monster
  • Epignathus
  • Fetus in fetu
  • Gastrothoracopagus
  • Gastrothoracopagus dipygus
  • Heterodymus
  • Ischiomelus
  • Ischiopagus
  • Janiceps
  • Katadidymus
  • Monocephalus
  • Omphalopagus
  • Opodidymus
  • Parapagus
  • Pygoamorphus
  • Pygodidymus
  • Pygopagus
  • Rachipagus
  • Symmetrical conjoined twins
  • Syncephalus
  • Synchephalus twins
  • Thoracodelphus
  • Thoracodidymus
  • Thoracodidymus
  • Thoracomelus
  • Thoracopagus
  • Thoracopagus epigastricus
  • Thoracopagus parasiticus
  • Thoracopagus with conjoined atria
  • Thoracopagus with conjoined atria and ventricles
  • Thoracopagus with separate hearts and common pericardial sac
  • Thoracopagus with separate hearts and pericardial sacs
  • Thoracoparacephalus
  • Triplet monster
  • Xiphopagus

Index of Diseases and Injuries
References found for the code Q89.4 in the Index of Diseases and Injuries:

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 (Medical Encyclopedia)

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