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ICD-10-CM Code Q91.1
Trisomy 18, mosaicism (mitotic nondisjunction)

Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
POA Exempt
POA Exempt Code
The Center for Medicare & Medicaid Services (CMS) requires medical coders to indicate whether or not a condition was present at the time of admission, in order to properly assign MS-DRG codes. This "Present On Admission" (POA) indicator is recorded on CMS form 4010A.
| ICD-10 from 2011 - 2016

Q91.1 is a billable ICD code used to specify a diagnosis of trisomy 18, mosaicism (mitotic nondisjunction). A 'billable code' is detailed enough to be used to specify a medical diagnosis.

POA Indicators on CMS form 4010A are as follows:

IndicatorMeaningCMS Will Pay CC/MCC DRG Costs
YDiagnosis was present at time of inpatient admissionYes
NDiagnosis was not present at time of inpatient admissionNo
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.No
WClinically undetermined. Provider unable to clinically determine whether the condition was present at the time of inpatient admission.Yes
1Exempt from POA reportingNo

The ICD code Q911 is used to code Edwards syndrome

Edwards syndrome (also known as trisomy 18 [T18]) is a chromosomal abnormality caused by the presence of all, or part of, an extra 18th chromosome. This genetic condition almost always results from nondisjunction during meiosis. It is named after John Hilton Edwards, who first described the syndrome in 1960. It is the second-most common autosomal trisomy, after Down syndrome, that carries to term.

Specialty: Medical Genetics, Pediatrics
MeSH Code: C580500
ICD 9 Code: 758.2

Chromosome 18

Source: Wikipedia

MS-DRG Mapping

  • DRG Group #884 - Organic disturbances and mental retardation.

Related Concepts SNOMET-CT

  • Trisomy 18 - mitotic nondisjunction mosaicism (disorder)

ICD-10-CM Alphabetical Index References for 'Q91.1 - Trisomy 18, mosaicism (mitotic nondisjunction)'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code Q91.1. Click on any term below to browse the alphabetical index.


Edwards' syndrome (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code Q91.1 and a single ICD9 code, 758.2 is an approximate match for comparison and conversion purposes.

Parent Code: Q91 - Trisomy 18 and Trisomy 13

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/Q911