Malignant neoplasm of overlapping sites of tonsil

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 overlapping sites of tonsil

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 C09 Malignant neoplasm of tonsil

Excludes2 - not included here

malignant neoplasm of lingual tonsil (C02.4)
malignant neoplasm of pharyngeal tonsil (C11.1)

Use additional code

code to identify:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
exposure to tobacco smoke in the perinatal period (P96.81)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

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 > tonsil > overlapping sites

Codes in the same group

Code	Description	Status
C09.0	Malignant neoplasm of tonsillar fossa	Valid
C09.1	Malignant neoplasm of tonsillar pillar (anterior) (posterior)	Valid
C09.9	Malignant neoplasm of tonsil, unspecified	Valid