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C09

Non-billable

Malignant neoplasm of tonsil

C09 is the ICD-10-CM code for Malignant neoplasm of tonsil. It is a non-billable category code — use a more specific child code such as C09.0 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Subcodes
4
Edition
FY2026

C00-D49 Neoplasms

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)

Frequently asked questions

What is ICD-10 code C09?
C09 is the ICD-10-CM code for "Malignant neoplasm of tonsil". It falls under C00-D49 Neoplasms.
Is C09 a billable code?
No — C09 is a non-billable header code. Use a more specific child code (such as C09.0) for billing.
What are the subcodes of C09?
C09 has 4 more specific child codes, including C09.0, C09.1, C09.8.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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