C09 (Malignant neoplasm of tonsil) is an umbrella ICD-10-CM medical diagnosis code in the Neoplasms chapter. It identifies cases of malignant neoplasm of tonsil for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

C09 — Malignant neoplasm of tonsil

Chapter C00-D49: Neoplasms

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Sub-codes under C09

C09.0Malignant neoplasm of tonsillar fossaC09.1Malig neoplasm of tonsillar pillar (anterior) (posterior)C09.8Malignant neoplasm of overlapping sites of tonsilC09.9Malignant neoplasm of tonsil, unspecified

Common questions about C09 (Malignant neoplasm of tonsil)

What does ICD-10 code C09 mean?
C09 is the ICD-10-CM 2025 code for Malignant neoplasm of tonsil. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is C09 a billable diagnosis code?
C09 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under C09. Browse the sub-codes listed on this page.
Which ICD-10 chapter does C09 belong to?
C09 belongs to the chapter "Neoplasms" (codes C00-D49). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Malignant neoplasm of tonsil?
For a plain-language explanation of Malignant neoplasm of tonsil, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Malignant neoplasm of tonsil" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗