AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2018 Issue 4; New/Revised ICD-10-CM Codes

Angelman Syndrome

Subcategory Q93, Monosomies and deletions from the autosomes, not elsewhere classified, was expanded and new codes were created to specifically identify Angelman Syndrome (Q93.51) and other deletions of part of a chromosome (Q93.59). Angelman Syndrome (AS) is a genetic neurodevelopmental disorder characterized by cognitive disability, motor dysfunction, speech impairment, hyperactivity, seizures, excessive laughing, decreased sleeping and gastroesophageal reflux. AS generally results from deletion, mutation or silencing of the gene for ubiquitin-protein ligase E3A (UBE3A). Deletions usually start and end at common breakpoints. Certain symptoms are associated with deletions involving particular regions, such as epilepsy. Some cases with...

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