C11 – Malignant neoplasm of nasopharynx

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lip, oral cavity and pharynx

Non-billable header

ICD-10-CM code C11
Code
C11 (claims format: C11)
Description
Malignant neoplasm of nasopharynx
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C00-C14 Malignant neoplasms of lip, oral cavity and pharynx

Billable codes under C11

C11 is a header code and cannot be used on claims. Choose the most specific code:

Notes 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)

Frequently asked questions

What is ICD-10 code C11?

C11 is the ICD-10-CM code for malignant neoplasm of nasopharynx, in the block C00-C14 (Malignant neoplasms of lip, oral cavity and pharynx).

Is C11 a billable code?

No. C11 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.