C44.21Header code — not billable
Basal cell carcinoma of skin of ear and external auricular canal
Short description: Basal cell carcinoma skin/ ear and external auricular canal
- Chapter
- 2. Neoplasms
- Category
- C44
- Effective date
- October 1, 2026
Related codes in category C44
C44Other and unspecified malignant neoplasm of skinC44.0Other and unspecified malignant neoplasm of skin of lipC44.00Unspecified malignant neoplasm of skin of lipYesC44.01Basal cell carcinoma of skin of lipYesC44.02Squamous cell carcinoma of skin of lipYesC44.09Other specified malignant neoplasm of skin of lipYesC44.1Oth and unsp malignant neoplasm skin/ eyelid, inc canthusC44.10Unsp malignant neoplasm of skin of eyelid, including canthusC44.101Unsp malignant neoplasm skin/ unsp eyelid, including canthusYesC44.102Unsp malignant neoplasm skin/ right eyelid, inc canthusC44.1021Unsp malig neoplasm skin/ right upper eyelid, inc canthusYesC44.1022Unsp malig neoplasm skin/ right lower eyelid, inc canthusYes
Frequently asked questions
What is ICD-10 code C44.21?
C44.21 is an ICD-10-CM diagnosis code for Basal cell carcinoma of skin of ear and external auricular canal.
Is C44.21 a billable code?
No. C44.21 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is C44.21 in?
C44.21 falls under Chapter 2: Neoplasms.
When did C44.21 become effective?
C44.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C44.21?
C44.21 belongs to category C44, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.