Specific code icon 2014 ICD-10-CM Diagnosis Code Q78.6

Multiple congenital exostoses

  • Q78.6 is a billable ICD-10-CM code that can be used to specify a diagnosis.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, Q78.6 and all other ICD-10-CM codes should only be used for training or planning purposes until then.
Clinical Information
  • Hereditary disorder transmitted by an autosomal dominant gene and characterized by multiple exostoses (multiple osteochondromas) near the ends of long bones. The genetic abnormality results in a defect in the osteoclastic activity at the metaphyseal ends of the bone during the remodeling process in childhood or early adolescence. The metaphyses develop benign, bony outgrowths often capped by cartilage. A small number undergo neoplastic transformation.
  • Hereditary disorder transmitted by autosomal dominant genes (ext1-3) and characterized by multiple exostoses (multiple osteochondromas) near the ends of long bones. The genetic abnormality results in a defect in the osteoclastic activity at the metaphyseal ends of the bone during the remodeling process in childhood or early adolescence. The metaphyses develop benign, bony outgrowths often capped by cartilage. A small number undergo neoplastic transformation.
Applicable To
  • Diaphyseal aclasis
Description Synonyms
  • Multiple congenital exostosis
  • Multiple heritable exostosis
Present On Admission
  • Q78.6 is considered exempt from POA reporting.
Mortality Data
  • Between 1999-2007 there was 1 death in the United States where ICD-10 Q78.6 was indicated as the underlying cause of death [source: cdc.govlink to cdc.gov]
  • ICD-10 Q78.6 as underlying cause of death data broken down by: gender, age, race, year
ICD-10-CM Q78.6 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
  • 564 Other musculoskeletal sys & connective tissue diagnoses with mcc
  • 565 Other musculoskeletal sys & connective tissue diagnoses with cc
  • 566 Other musculoskeletal sys & connective tissue diagnoses without cc/mcc
Convert ICD-10-CM Q78.6 to ICD-9-CM
The following ICD-10-CM Index entries contain back-references to ICD-10-CM Q78.6:
  • Aclasis, diaphyseal Q78.6
  • Diaphysial aclasis Q78.6
  • Exostosis - see also Disorder, bone
  • congenital (multiple) Q78.6
    multiple, congenital Q78.6