C11
⚠ Non-billable
Malignant neoplasm of nasopharynx
ICD-10-CM · FY2026 · Neoplasms
Code
C11
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
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)
Frequently asked questions
What is ICD-10 code C11?
ICD-10-CM code C11 represents Malignant neoplasm of nasopharynx. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C11 billable?
No. C11 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C11 in?
C11 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C11 category
C11.0
Malignant neoplasm of superior wall of nasopharynx
Billable
C11.1
Malignant neoplasm of posterior wall of nasopharynx
Billable
C11.2
Malignant neoplasm of lateral wall of nasopharynx
Billable
C11.3
Malignant neoplasm of anterior wall of nasopharynx
Billable
C11.8
Malignant neoplasm of overlapping sites of nasopharynx
Billable
C11.9
Malignant neoplasm of nasopharynx, unspecified
Billable
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