Monosomies and deletions from the autosomes, not elsewhere classified
In Chromosomal abnormalities, not elsewhere classified (Q90-Q99), chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities
14 billable codes under Q93: 1 is an MCC, 10 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Also applies, from Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
These notes sit on Q90-Q99 and apply to every code under it, including Q93.
Excludes2: not included here, code separately if applicable
- mitochondrial metabolic disorders (E88.4-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Assign Q00-QA1 codes for documented congenital anomalies or genetic disorders at any age, coding non-inherent manifestations separately and sequencing Z38 first on the birth admission.
All codes under Q93
Q93 can't be used on a claim. Pick a billable code below; grey headings group them.
- Q93.0Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction)
- Q93.1Whole chromosome monosomy, mosaicism (mitotic nondisjunction)
- Q93.2Chromosome replaced with ring, dicentric or isochromosome
- Q93.3Deletion of short arm of chromosome 4
- Q93.4Deletion of short arm of chromosome 5
- Q93.5Other deletions of part of a chromosome
- Q93.51Angelman syndrome
- Q93.52Phelan-McDermid syndrome
- Q93.59Other deletions of part of a chromosome
- Q93.7Deletions with other complex rearrangements
- Q93.8Other deletions from the autosomes
- Q93.81Velo-cardio-facial syndrome
- Q93.82Williams syndrome
- Q93.88Other microdeletions
- Q93.89Other deletions from the autosomes
- Q93.9Deletion from autosomes, unspecified
Q93 MS-DRGs
As the principal diagnosis, the billable codes under Q93 group to MS-DRG 884 or 951 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 884 Organic Disturbances and Intellectual Disability (11 of 14 codes)
- DRG 951 Other Factors Influencing Health Status (3 of 14 codes)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Genetic Disorders
Genetic disorders are health conditions caused by changes (also called mutations or variants) in your genes. Genes are parts of DNA found in your cells that carry instructions for how your body grows, develops, and functions. Many genes tell your body how to make proteins, which are needed for your body to work properly.
Read more about genetic disorders on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.