Specific code 2014 ICD-9-CM Diagnosis Code 437.5
Moyamoya disease
  • Billable Code
  • ICD-9-CM 437.5 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 437.5 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Clinical Information
  • A noninflammatory, progressive occlusion of the intracranial carotid arteries and the formation of netlike collateral arteries arising from the circle of willis. Cerebral angiogram shows the puff-of-smoke (moyamoya) collaterals at the base of the brain. It is characterized by endothelial hyperplasia and fibrosis with thickening of arterial walls. This disease primarily affects children but can also occur in adults.
  • A rare inherited vascular disorder characterized by constriction of arteries at the base of the brain, resulting in the formation of collateral circulation in order to compensate for the constriction. The name "moyamoya" in japanese means "puff of smoke" and derives from the characteristic radiographic appearance of the collateral vessels.
Convert to ICD-10-CM: 437.5 converts directly to:
  • 2014 ICD-10-CM I67.5 Moyamoya disease
ICD-9-CM Volume 2 Index entries containing back-references to 437.5:
  • Disease, diseased - see also Syndrome
    • Moyamoya 437.5
    • Nishimoto (-Takeuchi) 437.5
  • Encephaloduroarteriomyosynangiosis (EDAMS) 437.5
  • Moya Moya disease 437.5
  • Nishimoto (-Takeuchi) disease 437.5
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 437.5 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.