Cancer of the sinus, ethmoidal
Primary malignant neoplasm of ethmoidal sinus
Primary squamous cell carcinoma of ethmoidal sinus
Squamous cell carcinoma, ethmoid sinus
A primary or metastatic malignant neoplasm involving the ethmoid sinuses.
C31.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM C31.1 became effective on October 1, 2022.
This is the American ICD-10-CM version of C31.1 – other international versions of ICD-10 C31.1 may differ.