C09.1Billable

Malignant neoplasm of tonsillar pillar (anterior) (posterior)

Short description: Malig neoplasm of tonsillar pillar (anterior) (posterior)

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

Related codes in category C09

C09Malignant neoplasm of tonsilC09.0Malignant neoplasm of tonsillar fossaYesC09.8Malignant neoplasm of overlapping sites of tonsilYesC09.9Malignant neoplasm of tonsil, unspecifiedYes

Frequently asked questions

What is ICD-10 code C09.1?

C09.1 is an ICD-10-CM diagnosis code for Malignant neoplasm of tonsillar pillar (anterior) (posterior).

Is C09.1 a billable code?

Yes. C09.1 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is C09.1 in?

C09.1 falls under Chapter 2: Neoplasms.

When did C09.1 become effective?

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

What other codes are related to C09.1?

C09.1 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.