Specific code 2015 ICD-9-CM Diagnosis Code 238.5
Neoplasm of uncertain behavior of histiocytic and mast cells
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 238.5 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 238.5 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 238.5 converts directly to:
  • 2015/16 ICD-10-CM D47.0 Histiocytic and mast cell tumors of uncertain behavior
Approximate Synonyms
  • Mastocytoma
  • Neoplasm of uncertain behavior, histiocytic or mas
  • Neoplasm of uncertain behavior, histiocytic or mast cell
Clinical Information
  • A heterogeneous group of disorders characterized by the abnormal growth and accumulation of mast cells in one or more organ systems. Recent data suggest that most variants of mastocytosis are clonal disorders. (who, 2001)
  • A localized tumor composed of sheets of mast cells without atypia. It includes the cutaneous mastocytoma which involves the dermis and subcutaneous tissue, and the extracutaneous mastocytoma. Most cases of extracutaneous mastocytoma have been reported in the lung
  • A nodule of mast cells. Mastocytomas can involve the skin, subcutaneous tissue, and sometimes muscle. Also called a mast cell tumor
  • Nodular cutaneous mast cell infiltrate, which is usually present at birth or soon after as a solitary nodule, although three to four lesions may occur; lesions typical of urticaria pigmentosa may occur later
Applies To
  • Mast cell tumor NOS
  • Mastocytoma NOS
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 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.