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D04.21

Billable

Carcinoma in situ of skin of right ear and external auricular canal

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

This code describes an early-stage skin cancer on the right ear or ear canal that has not yet spread to deeper tissues or other parts of the body. It represents abnormal cells that have the potential to become invasive cancer if not treated.

Coding Tips

  • •Ensure laterality is documented as right ear (D04.21) versus left ear (D04.20) or bilateral (D04.22) to select the correct code
  • •Carcinoma in situ is a precancerous condition; do not confuse with invasive melanoma or other malignant neoplasms which use different code ranges (C43 or C44)

Code Hierarchy

└D04Carcinoma in situ of skin└D04.2Carcinoma in situ of skin of ear and external auricular canal└D04.21Carcinoma in situ of skin of right ear and external auricular canal
└D04.21Carcinoma in situ of skin of right ear and external auricular canal

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