C09

Non-Billable
ChapterC00–D49
Rankcategory
Official Description

Malignant neoplasm of tonsil

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 2: Neoplasms (C00-D49).

Instructional Notes

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)

Clinical Hierarchy

CH2Neoplasms (C00-D49)
C00-C14Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
C09Malignant neoplasm of tonsil
C09.0Malignant neoplasm of tonsillar fossa
C09.1Malignant neoplasm of tonsillar pillar (anterior) (posterior)
C09.8Malignant neoplasm of overlapping sites of tonsil
C09.9Malignant neoplasm of tonsil, unspecified

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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