Home > 2015 ICD-9-CM Diagnosis Codes > Neoplasms 140-239 > Malignant Neoplasm Of Bone, Connective Tissue, Skin, And Breast 170-176 > Oth and unspec malignant neoplasm of skin 173-
Specific code 2015 ICD-9-CM Diagnosis Code 173.21
Basal cell carcinoma of skin of ear and external auditory canal
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 173.21 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 173.21 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: 173.21 converts approximately to:
  • 2015/16 ICD-10-CM C44.211 Basal cell carcinoma of skin of unspecified ear and external auricular canal
Approximate Synonyms
  • Basal cell carcinoma of auricle of ear
  • Basal cell carcinoma of ear
  • Basal cell carcinoma of external auditory canal
  • Basal cell carcinoma, auricle
  • Basal cell carcinoma, ear
  • Basal cell carcinoma, external auditory canal
  • Cancer of the auricle of ear, basal cell
  • Cancer of the ext auditory canal, basal cell
  • Cancer of the skin of ear, basal cell
 173.20 ICD9Data.com 173.22 
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 173.21 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.
Free ICD-9-CM Codes
Site Information
Free ICD-10-CM/PCS Codes
Free HCPCS Codes