Non-specific code 2014 ICD-9-CM Diagnosis Code 202.6
Malignant mast cell tumors
  • Non-Billable Code
  • There are 9 ICD-9-CM codes below 202.6 that define this diagnosis in greater detail. Do not use this code on a reimbursement claim.
Clinical Information
  • A rare entity characterized by localized but destructive growth of a tumor consisting of highly atypical, immature mast cells.(who, 2001)
  • A unifocal malignant tumor that consists of atypical pathological mast cells without systemic involvement. It causes local destructive growth in organs other than in skin or bone marrow.
  • A variant of mastocytosis characterized by multifocal, dense infiltrates of mast cells (15 or more mast cells in aggregates) detected in the bone marrow and/or other extracutaneous sites. (who, 2001)
  • Malignant neoplasm originating from mast cells.
202.6 Excludes
  • mast cell leukemia (207.8)
Applies To
  • Malignant:
    • mastocytoma
    • mastocytosis
  • Mast cell sarcoma
  • Systemic tissue mast cell disease
ICD-9-CM Volume 2 Index entries containing back-references to 202.6:
  • Disease, diseased - see also Syndrome
    • mast cell 757.33
      • systemic (M9741/3) 202.6
    • systemic tissue mast cell (M9741/3) 202.6
  • Mast cell
    • disease 757.33
      • systemic (M9741/3) 202.6
    • sarcoma (M9740/3) 202.6
    • tumor (M9740/1) 238.5
      • malignant (M9740/3) 202.6
  • Mastocytoma (M9740/1) 238.5
    • malignant (M9740/3) 202.6
  • Mastocytosis 757.33
    • malignant (M9741/3) 202.6
    • systemic (M9741/3) 202.6
  • Sarcoma (M8800/3) - see also Neoplasm, connective tissue, malignant
    • mast cell (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 202.6 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.