Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

All CodesBillable Only
Internal Codes
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  • C09.8—

    Malignant neoplasm of overlapping sites of tonsil

  • C09.9—

    Malignant neoplasm of tonsil, unspecified

  • C10—

    Malignant neoplasm of oropharynx

  • C10.0—

    Malignant neoplasm of vallecula

  • C10.1—

    Malignant neoplasm of anterior surface of epiglottis

  • C10.2—

    Malignant neoplasm of lateral wall of oropharynx

  • C10.3—

    Malignant neoplasm of posterior wall of oropharynx

  • C10.4—

    Malignant neoplasm of branchial cleft

  • C10.8—

    Malignant neoplasm of overlapping sites of oropharynx

  • C10.9—

    Malignant neoplasm of oropharynx, unspecified

  • C11—

    Malignant neoplasm of nasopharynx

  • C11.0—

    Malignant neoplasm of superior wall of nasopharynx

  • C11.1—

    Malignant neoplasm of posterior wall of nasopharynx

  • C11.2—

    Malignant neoplasm of lateral wall of nasopharynx

  • C11.3—

    Malignant neoplasm of anterior wall of nasopharynx

  • C11.8—

    Malignant neoplasm of overlapping sites of nasopharynx

  • C11.9—

    Malignant neoplasm of nasopharynx, unspecified

  • C12—

    Malignant neoplasm of pyriform sinus

  • C13—

    Malignant neoplasm of hypopharynx

  • C13.0—

    Malignant neoplasm of postcricoid region

  • C13.1—

    Malignant neoplasm of aryepiglottic fold, hypopharyngeal aspect

  • C13.2—

    Malignant neoplasm of posterior wall of hypopharynx

  • C13.8—

    Malignant neoplasm of overlapping sites of hypopharynx

  • C13.9—

    Malignant neoplasm of hypopharynx, unspecified

  • C14—

    Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx

  • C14.0—

    Malignant neoplasm of pharynx, unspecified

  • C14.2—

    Malignant neoplasm of Waldeyer's ring

  • C14.8—

    Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx

  • C15—

    Malignant neoplasm of esophagus

  • C15.3—

    Malignant neoplasm of upper third of esophagus

  • C15.4—

    Malignant neoplasm of middle third of esophagus

  • C15.5—

    Malignant neoplasm of lower third of esophagus

  • C15.8—

    Malignant neoplasm of overlapping sites of esophagus

  • C15.9—

    Malignant neoplasm of esophagus, unspecified

  • C16—

    Malignant neoplasm of stomach

  • C16.0—

    Malignant neoplasm of cardia

  • C16.1—

    Malignant neoplasm of fundus of stomach

  • C16.2—

    Malignant neoplasm of body of stomach

  • C16.3—

    Malignant neoplasm of pyloric antrum

  • C16.4—

    Malignant neoplasm of pylorus

  • C16.5—

    Malignant neoplasm of lesser curvature of stomach, unspecified

  • C16.6—

    Malignant neoplasm of greater curvature of stomach, unspecified

  • C16.8—

    Malignant neoplasm of overlapping sites of stomach

  • C16.9—

    Malignant neoplasm of stomach, unspecified

  • C17—

    Malignant neoplasm of small intestine

  • C17.0—

    Malignant neoplasm of duodenum

  • C17.1—

    Malignant neoplasm of jejunum

  • C17.2—

    Malignant neoplasm of ileum

  • C17.3—

    Meckel's diverticulum, malignant

  • C17.8—

    Malignant neoplasm of overlapping sites of small intestine

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