Q93.4Deletion of short arm of chromosome 5

Q93.4 is the ICD-10-CM diagnosis code for deletion of short arm of chromosome 5. It belongs to category Q93 (Monosomies and deletions from the autosomes, not elsewhere classified), block Q90-Q99 (chromosomal abnormalities, not elsewhere classified) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Q93 (Monosomies and deletions from the autosomes, not elsewhere classified), Q93.4 is specifically for deletion of short arm of chromosome 5. Related codes cover whole chromosome monosomy, nonmosaicism (meiotic nondisjunction) (Q93.0), whole chromosome monosomy, mosaicism (mitotic nondisjunction) (Q93.1), chromosome replaced with ring, dicentric or isochromosome (Q93.2), deletion of short arm of chromosome 4 (Q93.3), other deletions of part of a chromosome (Q93.5), deletions with other complex rearrangements (Q93.7), other deletions from the autosomes (Q93.8) and deletion from autosomes, unspecified (Q93.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 758.31 (Cri-du-chat syndrome).