Malignant neoplasm of accessory sinus, unspecified

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2007 Added to the draft code set draft Malignant neoplasm of accessory sinus, unspecified

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from the C30-C39 section Malignant neoplasms of respiratory and intrathoracic organs (C30-C39)

Excludes1 - never coded here

mesothelioma (C45.-)

Includes

malignant neoplasm of middle ear

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Neoplasm, neoplastic > nasal
Neoplasm, neoplastic > accessory sinus
Neoplasm, neoplastic > nose, nasal > sinus
Neoplasm, neoplastic > sinus
Neoplasm, neoplastic > sinus > nasal, paranasal NEC

Codes in the same group

Code	Description	Status
C31.0	Malignant neoplasm of maxillary sinus	Valid
C31.1	Malignant neoplasm of ethmoidal sinus	Valid
C31.2	Malignant neoplasm of frontal sinus	Valid
C31.3	Malignant neoplasm of sphenoid sinus	Valid
C31.8	Malignant neoplasm of overlapping sites of accessory sinuses	Valid