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C09 ⚠ Non-billable

Malignant neoplasm of tonsil

ICD-10-CM · FY2026 · Neoplasms

Code
C09
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code C09?
ICD-10-CM code C09 represents Malignant neoplasm of tonsil. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C09 billable?
No. C09 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C09 in?
C09 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.

Related codes in the C09 category

C09.0 Malignant neoplasm of tonsillar fossa Billable C09.1 Malignant neoplasm of tonsillar pillar (anterior) (posterior) Billable C09.8 Malignant neoplasm of overlapping sites of tonsil Billable C09.9 Malignant neoplasm of tonsil, unspecified Billable

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