C31.9
Malignant neoplasm of accessory sinus, unspecified
Approximate Synonyms
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Cancer of the accessory sinus
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Cancer of the accessory sinus, adenocarcinoma
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Cancer of the accessory sinus, squamous cell
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Primary adenocarcinoma of accessory sinus
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Primary malignant neoplasm of accessory sinus
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Primary squamous cell carcinoma of accessory sinus
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Sinonasal melanoma
Clinical Information
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A primary or metastatic malignant neoplasm involving the paranasal sinuses.
Details
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C31.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
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The 2023 edition of ICD-10-CM C31.9 became effective on October 1, 2022.
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This is the American ICD-10-CM version of C31.9 – other international versions of ICD-10 C31.9 may differ.