C11Header code — not billable
Malignant neoplasm of nasopharynx
- Chapter
- 2. Neoplasms
- Category
- C11
- Effective date
- October 1, 2026
Related codes in category C11
C11.0Malignant neoplasm of superior wall of nasopharynxYesC11.1Malignant neoplasm of posterior wall of nasopharynxYesC11.2Malignant neoplasm of lateral wall of nasopharynxYesC11.3Malignant neoplasm of anterior wall of nasopharynxYesC11.8Malignant neoplasm of overlapping sites of nasopharynxYesC11.9Malignant neoplasm of nasopharynx, unspecifiedYes
Frequently asked questions
What is ICD-10 code C11?
C11 is an ICD-10-CM diagnosis code for Malignant neoplasm of nasopharynx.
Is C11 a billable code?
No. C11 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is C11 in?
C11 falls under Chapter 2: Neoplasms.
When did C11 become effective?
C11 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C11?
C11 belongs to category C11, which includes 6 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.