Specific code 2011 ICD-9-CM Diagnosis Code 174.9
Malignant neoplasm of breast (female) unspecified site
  • Short description: Malign neopl breast NOS.
  • ICD-9-CM 174.9 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 174.9 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2011 version of ICD-9-CM 174.9.
  • More recent version(s) of ICD-9-CM 174.9: 2012 2013 2014.
Disease Synonyms
  • Breast cancer
  • Breast cancer metastatic to LN
  • Breast cancer metastatic to lymph node
  • CA female breast, infiltrating ductal
  • CA female breast, infiltrating ductal, stage 1
  • CA female breast, infiltrating ductal, stage 2
  • CA female breast, infiltrating lobular
  • CA of female breast
  • Cancer female breast malig cystosarcoma phyllodes
  • Cancer female breast, right breast
  • Cancer of the female breast
  • Cancer of the female breast, infiltrating ductal
  • Cancer of the female breast, infiltrating lobular
  • Cancer of the female breast, recurrent
  • Cancer, breast, invasive, female
  • Cancer, female breast, left breast
  • Female breast cancer
  • Female breast cancer metastatic to eye
  • Female breast cancer with metastasis to eye
  • Female breast cancer, L breast
  • Female breast cancer, left breast
  • Female breast cancer, R breast
  • Female breast cancer, right breast
  • Female breast infiltrating ductal carcinoma
  • Female breast infiltrating ductal carcinoma, L breast
  • Female breast infiltrating ductal carcinoma, left breast
  • Female breast infiltrating ductal carcinoma, R breast
  • Female breast infiltrating ductal carcinoma, right breast
  • Female breast infiltrating ductal carcinoma, stage 1
  • Female breast infiltrating ductal carcinoma, stage 2
  • Female breast infiltrating ductal carcinoma, stage 3
  • Female breast infiltrating ductal carcinoma, stage 4
  • Female breast infiltrating lobular carcinoma
  • Female breast inflammatory cancer
  • Female inflammatory breast cancer
  • Infiltrating duct carcinoma of breast
  • Infiltrating ductal carcinoma of breast, stage 1
  • Infiltrating ductal carcinoma of breast, stage 2
  • Infiltrating ductal carcinoma of breast, stage 3
  • Infiltrating ductal carcinoma of breast, stage 4
  • Infiltrating ductal carcinoma of left female breast
  • Infiltrating ductal carcinoma of right female breast
  • Infiltrating lobular carcinoma of breast
  • Invasive female breast cancer
  • Lobular carcinoma of breast
  • Malignant cystosarcoma phyllodes
  • Malignant neoplasm of female breast
  • Malignant phyllodes tumor of breast
  • Primary invasive malignant neoplasm of female breast
  • Primary malignant inflammatory neoplasm of female breast
  • Primary malignant neoplasm of female left breast
  • Primary malignant neoplasm of female right breast
  • Recurrent female breast cancer
  • Recurrent primary malignant neoplasm of breast
  • Secondary malignant neoplasm of eye from female breast
  • Secondary malignant neoplasm of lymph node from neoplasm of breast
Convert to ICD-10-CM: 174.9 converts approximately to:
  • 2014 ICD-10-CM C50.919 Malignant neoplasm of unspecified site of unspecified female breast
ICD-9-CM Volume 2 Index entries containing back-references to 174.9:
  • Adenocarcinoma (M8140/3) - see also Neoplasm, by site, malignant
    • duct (infiltrating) (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • infiltrating duct (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • inflammatory (M8530/3)
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • lobular (M8520/3)
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
  • Carcinoma (M8010/3) - see also Neoplasm, by site, malignant
    • duct (cell) (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
      • infiltrating (M8500/3)
        • specified site - see Neoplasm, by site, malignant
        • unspecified site 174.9
    • infiltrating duct (M8500/3)
      • with Paget's disease (M8541/3) - see Neoplasm, breast, malignant
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • inflammatory (M8530/3)
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • lobular (infiltrating) (M8520/3)
      • noninfiltrating (M8520/3)
        • specified site - see Neoplasm, by site, in situ
        • unspecified site 233.0
      • specified site - see Neoplasm, by site, malignant
      • unspecified site 174.9
    • medullary (M8510/3)
      • with
        • amyloid stroma (M8511/3)
          • specified site - see Neoplasm, by site, malignant
          • unspecified site 193
        • lymphoid stroma (M8512/3)
          • specified site - see Neoplasm, by site, malignant
          • unspecified site 174.9
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 174.9 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 2011 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.