2020 ICD-10-CM Diagnosis Code Q91.3

Trisomy 18, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
  • Q91.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM Q91.3 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of Q91.3 - other international versions of ICD-10 Q91.3 may differ.
The following code(s) above Q91.3 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Q91.3:
  • Q00-Q99
    2020 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
  • Q90-Q99
    2020 ICD-10-CM Range Q90-Q99

    Chromosomal abnormalities, not elsewhere classified

    Type 2 Excludes
    • mitochondrial metabolic disorders (E88.4-)
    Chromosomal abnormalities, not elsewhere classified
Approximate Synonyms
  • Complete trisomy 18 syndrome
  • Trisomy 18, complete
Clinical Information
  • A chromosomal abnormality consisting of the presence of a third copy of chromosome 18 in somatic cells.
  • A kind of genetic disease
  • A syndrome characterized by the presence of an extra (third) chromosome on an otherwise diploid chromosome 18 associated with a broad spectrum of variable abnormalities consisting of more than 130 individual defects of the craniofacial structures, brain, heart, kidneys, and gut. One-third of newborn infants (weighing about 2300) are premature and two-thirds are female. Fetal abnormalities consist mainly of polyhydramnios, small placenta, and single umbilical artery. Tumors in some cases. Trisomy 18 mosaicism is often associated with normal intelligence and mild phenotype.
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Q91.3 is considered exempt from POA reporting.
ICD-10-CM Q91.3 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 884 Organic disturbances and intellectual disability

Convert Q91.3 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to Q91.3:
  • Syndrome - see also Disease
    • trisomy Q92.9
      ICD-10-CM Diagnosis Code Q92.9

      Trisomy and partial trisomy of autosomes, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
  • Trisomy (syndrome) Q92.9
    ICD-10-CM Diagnosis Code Q92.9

    Trisomy and partial trisomy of autosomes, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    • 18 (partial) Q91.3

ICD-10-CM Codes Adjacent To Q91.3
Q89.9 Congenital malformation, unspecified
Q90 Down syndrome
Q90.0 Trisomy 21, nonmosaicism (meiotic nondisjunction)
Q90.1 Trisomy 21, mosaicism (mitotic nondisjunction)
Q90.2 Trisomy 21, translocation
Q90.9 Down syndrome, unspecified
Q91 Trisomy 18 and Trisomy 13
Q91.0 Trisomy 18, nonmosaicism (meiotic nondisjunction)
Q91.1 Trisomy 18, mosaicism (mitotic nondisjunction)
Q91.2 Trisomy 18, translocation
Q91.3 Trisomy 18, unspecified
Q91.4 Trisomy 13, nonmosaicism (meiotic nondisjunction)
Q91.5 Trisomy 13, mosaicism (mitotic nondisjunction)
Q91.6 Trisomy 13, translocation
Q91.7 Trisomy 13, unspecified
Q92 Other trisomies and partial trisomies of the autosomes, not elsewhere classified
Q92.0 Whole chromosome trisomy, nonmosaicism (meiotic nondisjunction)
Q92.1 Whole chromosome trisomy, mosaicism (mitotic nondisjunction)
Q92.2 Partial trisomy
Q92.5 Duplications with other complex rearrangements
Q92.6 Marker chromosomes

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.