Specific code 2012 ICD-9-CM Diagnosis Code 238.5
Neoplasm of uncertain behavior of histiocytic and mast cells
  • Short description: Mastocytoma NOS.
  • ICD-9-CM 238.5 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 238.5 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2012 version of ICD-9-CM 238.5.
  • More recent version(s) of ICD-9-CM 238.5: 2013 2014.
Disease Synonyms
  • Mastocytoma
  • Neoplasm of uncertain behavior, histiocytic or mas
  • Neoplasm of uncertain behavior, histiocytic or mast cell
Applies To
  • Mast cell tumor NOS
  • Mastocytoma NOS
Convert to ICD-10-CM: 238.5 converts directly to:
  • 2014 ICD-10-CM D47.0 Histiocytic and mast cell tumors of uncertain behavior
ICD-9-CM Volume 2 Index entries containing back-references to 238.5:
  • Mast cell
    • tumor (M9740/1) 238.5
      • malignant (M9740/3) 202.6
  • Mastocytoma (M9740/1) 238.5
    • malignant (M9740/3) 202.6
  • Tumor (M8000/1) - see also Neoplasm, by site, unspecified nature
    • mast cell (M9740/1) 238.5
      • malignant (M9740/3) 202.6
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 238.5 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 2012 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.