2021 ICD-10-CM Diagnosis Code Q99.8

Other specified chromosome abnormalities

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • Q99.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM Q99.8 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of Q99.8 - other international versions of ICD-10 Q99.8 may differ.
The following code(s) above Q99.8 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 Q99.8:
  • Q00-Q99
    2021 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
    2021 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
  • Autosomal aneuploidy
  • Unbalanced chromosomal translocation (abnormal structure of chromosomes)
  • Unbalanced translocation of chromosome
  • Undervirilization of male due to steroidogenic acute regulatory protein deficiency
  • Undervirilized xy, star protein deficiency
  • Virilization of female due to sox9 gene duplication
  • Virilization of female due to sry gene translocation
  • Virilized xx, sox9 duplication
  • Virilized xx, sry translocation
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.
  • Q99.8 is considered exempt from POA reporting.
ICD-10-CM Q99.8 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 729 Other male reproductive system diagnoses with cc/mcc
  • 730 Other male reproductive system diagnoses without cc/mcc
  • 742 Uterine and adnexa procedures for non-malignancy with cc/mcc
  • 743 Uterine and adnexa procedures for non-malignancy without cc/mcc
  • 760 Menstrual and other female reproductive system disorders with cc/mcc
  • 761 Menstrual and other female reproductive system disorders without cc/mcc

Convert Q99.8 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
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to Q99.8:

ICD-10-CM Codes Adjacent To Q99.8
Q98.4 Klinefelter syndrome, unspecified
Q98.5 Karyotype 47, XYY
Q98.6 Male with structurally abnormal sex chromosome
Q98.7 Male with sex chromosome mosaicism
Q98.8 Other specified sex chromosome abnormalities, male phenotype
Q98.9 Sex chromosome abnormality, male phenotype, unspecified
Q99 Other chromosome abnormalities, not elsewhere classified
Q99.0 Chimera 46, XX/46, XY
Q99.1 46, XX true hermaphrodite
Q99.2 Fragile X chromosome
Q99.8 Other specified chromosome abnormalities
Q99.9 Chromosomal abnormality, unspecified
R00 Abnormalities of heart beat
R00.0 Tachycardia, unspecified
R00.1 Bradycardia, unspecified
R00.2 Palpitations
R00.8 Other abnormalities of heart beat
R00.9 Unspecified abnormalities of heart beat
R01 Cardiac murmurs and other cardiac sounds
R01.0 Benign and innocent cardiac murmurs
R01.1 Cardiac murmur, unspecified

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