Specific code 2014 ICD-9-CM Diagnosis Code 758.33
Other microdeletions
  • Billable Code
  • Short description: Microdeletions NEC.
  • ICD-9-CM 758.33 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 758.33 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Clinical Information
  • A developmental defect of the brain caused by incomplete neuronal migration and characterized by smoothness of the surface of the brain (lissencephaly) occurring in association with absence of the sulci and gyri (agyria) and thickening of the cerebral cortex with four rather than six layers (pachygyria), microcephaly, characteristic facial appearance, retarded growth and mental development, neurological complications, and multiple abnormalities of the brain, kidneys, heart, gastrointestinal tract, and other organs. Lissencephaly, once considered as synonymous with walker-warburg syndrome and norman-roberts syndrome, is now recognized as a component of several other syndromes. Type i (the classical form) is a component of miller-dieker and norman-roberts syndromes, also occurring as a separate entity; type ii the walker-warburg and muscle-eye-brain syndrome, also occurring in the neu-laxova syndrome.
  • A rare chromosomal disorder characterized by abnormalities of the craniofacial area (brachycephaly, prognathism, cleft palate), delays in the acquisition of skills requiring the coordination of mental and muscular activities, mental retardation; most affected individuals experience speech delays that may occur in association with hearing impairment; behavioral abnormalities may include hyperactivity and self-destructive behavior.
  • Deletion of the short arm of chromosome 17. As initially reported, the syndrome consisted mainly of cleft palate and congenital heart defect. The phenotype was later expanded to include brachycephaly, midfacial hypoplasia, broad nasal bridge, highly arched palate, mandibular prognathism, malformed ears, short hands, mental retardation, and other less constant abnormalities.
Applies To
  • Miller-Dieker syndrome
  • Smith-Magenis syndrome
Convert to ICD-10-CM: 758.33 converts directly to:
  • 2014 ICD-10-CM Q93.88 Other microdeletions
ICD-9-CM Volume 2 Index entries containing back-references to 758.33:
  • Microdeletions NEC 758.33
  • Miller-Dieker syndrome 758.33
  • Smith-Magenis syndrome 758.33
  • Syndrome - see also Disease
    • Miller-Dieker 758.33
    • Smith-Magenis 758.33
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 758.33 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.