Search Browse Crosswalk Fees Tools Pricing

Codelle

AI-powered medical coding assistant for healthcare practices and billers.

Pricing Privacy Terms

© 2026 Codelle. All rights reserved.

CPT® copyright 2026 American Medical Association. All rights reserved. CPT is a registered trademark of the American Medical Association. Applicable FARS/DFARS restrictions apply to government use. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use.

ICD-10-CM C31 — Malignant neoplasm of accessory s… | Codelle

C31

ICD-10-CM

Malignant neoplasm of accessory sinuses

Code Hierarchy

Subcodes (6)

C31.0Malignant neoplasm of maxillary sinus

C31.1Malignant neoplasm of ethmoidal sinus

C31.2Malignant neoplasm of frontal sinus

C31.3Malignant neoplasm of sphenoid sinus

C31.8Malignant neoplasm of overlapping sites of accessory sinuses

C31.9Malignant neoplasm of accessory sinus, unspecified

Same Category

C31.0Malignant neoplasm of maxillary sinus C31.1Malignant neoplasm of ethmoidal sinus C31.2Malignant neoplasm of frontal sinus C31.3Malignant neoplasm of sphenoid sinus C31.8Malignant neoplasm of overlapping sites of accessory sinuses C31.9Malignant neoplasm of accessory sinus, unspecified