ICD-10-CM C11: Malignant neoplasm of nasopharynx

ICD-10-CM Diagnosis Code (2025)

Official Description for C11

Malignant neoplasm of nasopharynx

Coding Notes & Guidelines for C11

Use Additional Code
  • code to identify:
  • 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)
Inclusion Terms

Malignant neoplasm of roof of nasopharynx

Inclusion Terms
  • Malignant neoplasm of adenoid
  • Malignant neoplasm of pharyngeal tonsil
Inclusion Terms
  • Malignant neoplasm of fossa of Rosenmüller
  • Malignant neoplasm of opening of auditory tube
  • Malignant neoplasm of pharyngeal recess
Inclusion Terms
  • Malignant neoplasm of floor of nasopharynx
  • Malignant neoplasm of nasopharyngeal (anterior) (posterior) surface of soft palate
  • Malignant neoplasm of posterior margin of nasal choana
  • Malignant neoplasm of posterior margin of nasal septum
Inclusion Terms

Malignant neoplasm of nasopharyngeal wall NOS

Child Codes (More Specific Codes for C11):

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

About ICD-10-CM Code C11 (Malignant neoplasm of nasopharynx)

ICD-10-CM code C11 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C11 became effective on October 1, 2024.

This page provides detailed information about C11 - Malignant neoplasm of nasopharynx. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neoplasm of nasopharynx.