ICD-10 Diagnosis Code Q99.9

Chromosomal abnormality, unspecified

Diagnosis Code Q99.9

ICD-10: Q99.9
Short Description: Chromosomal abnormality, unspecified
Long Description: Chromosomal abnormality, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code Q99.9

Valid for Submission
The code Q99.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
      • Other chromosome abnormalities, not elsewhere classified (Q99)

Information for Medical Professionals

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.
  • 758.9 - Chromosome anomaly NOS

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 Q99.9 is exempt from POA reporting.

  • Anomaly of chromosome pair 1
  • Anomaly of chromosome pair 10
  • Anomaly of chromosome pair 11
  • Anomaly of chromosome pair 12
  • Anomaly of chromosome pair 13
  • Anomaly of chromosome pair 14
  • Anomaly of chromosome pair 15
  • Anomaly of chromosome pair 16
  • Anomaly of chromosome pair 17
  • Anomaly of chromosome pair 18
  • Anomaly of chromosome pair 19
  • Anomaly of chromosome pair 2
  • Anomaly of chromosome pair 20
  • Anomaly of chromosome pair 21
  • Anomaly of chromosome pair 22
  • Anomaly of chromosome pair 3
  • Anomaly of chromosome pair 4
  • Anomaly of chromosome pair 5
  • Anomaly of chromosome pair 6
  • Anomaly of chromosome pair 7
  • Anomaly of chromosome pair 8
  • Anomaly of chromosome pair 9
  • Autosomal chromosomal disorder
  • Autosomal dominant hereditary disorder
  • Autosomal hereditary disorder
  • Autosomal recessive hereditary disorder
  • Autosomal translocation
  • Cardiac arrhythmia associated with genetic disorder
  • Chromosomal disorder
  • Congenital disorder due to abnormality of chromosome number OR structure
  • Dominant autosomal hereditary disorder, complete penetrance
  • Dominant autosomal hereditary disorder, incomplete penetrance
  • Genetic syndrome
  • Heritable pulmonary arterial hypertension
  • Heritable pulmonary arterial hypertension due to activin A receptor type II-like kinase 1 or endoglin mutation
  • Immunodeficiency associated with chromosomal abnormality
  • Ulnar mammary syndrome

Information for Patients

Genetic Disorders

Genes are the building blocks of heredity. They are passed from parent to child. They hold DNA, the instructions for making proteins. Proteins do most of the work in cells. They move molecules from one place to another, build structures, break down toxins, and do many other maintenance jobs.

Sometimes there is a mutation, a change in a gene or genes. The mutation changes the gene's instructions for making a protein, so the protein does not work properly or is missing entirely. This can cause a medical condition called a genetic disorder.

You can inherit a gene mutation from one or both parents. A mutation can also happen during your lifetime.

There are three types of genetic disorders:

  • Single-gene disorders, where a mutation affects one gene. Sickle cell anemia is an example.
  • Chromosomal disorders, where chromosomes (or parts of chromosomes) are missing or changed. Chromosomes are the structures that hold our genes. Down syndrome is a chromosomal disorder.
  • Complex disorders, where there are mutations in two or more genes. Often your lifestyle and environment also play a role. Colon cancer is an example.

Genetic tests on blood and other tissue can identify genetic disorders.

NIH: National Library of Medicine

  • Genetics (Medical Encyclopedia)

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