C09Header code — not billable

Malignant neoplasm of tonsil

Chapter
2. Neoplasms
Category
C09
Effective date
October 1, 2026

Related codes in category C09

C09.0Malignant neoplasm of tonsillar fossaYesC09.1Malig neoplasm of tonsillar pillar (anterior) (posterior)YesC09.8Malignant neoplasm of overlapping sites of tonsilYesC09.9Malignant neoplasm of tonsil, unspecifiedYes

Frequently asked questions

What is ICD-10 code C09?

C09 is an ICD-10-CM diagnosis code for Malignant neoplasm of tonsil.

Is C09 a billable code?

No. C09 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is C09 in?

C09 falls under Chapter 2: Neoplasms.

When did C09 become effective?

C09 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to C09?

C09 belongs to category C09, which includes 4 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.