C11 ICD-10-CM Code: Malignant neoplasm of nasopharynx
A clear reference for the official code description, hierarchy, and related coding information from the April 2026 U.S. release.
Code definition
Official description
C11Malignant neoplasm of nasopharynx
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where C11 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
- 3
Category C11
Malignant neoplasm of nasopharynx
- 4
Code C11
Malignant neoplasm of nasopharynx
More specific choices
Codes under C11
C11 is a non-billable category. Choose the child code that best matches the documented diagnosis.
C11.0Malignant neoplasm of superior wall of nasopharynx
C11.1Malignant neoplasm of posterior wall of nasopharynx
C11.2Malignant neoplasm of lateral wall of nasopharynx
C11.3Malignant neoplasm of anterior wall of nasopharynx
C11.8Malignant neoplasm of overlapping sites of nasopharynx
C11.9Malignant neoplasm of nasopharynx, unspecified
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for C11.
Code first
No “code first” instruction is listed for C11.
Use additional code
No “use additional code” instruction is listed for C11.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for C11.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for C11.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code C11 mean?
C11 is the April 2026 U.S. ICD-10-CM code for “Malignant neoplasm of nasopharynx.”
Is C11 a billable or specific ICD-10-CM code?
No. C11 has more specific child codes in the April 2026 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is C11 located in ICD-10-CM?
C11 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of lip, oral cavity and pharynx (C00-C14) (C00–C14), under category C11, Malignant neoplasm of nasopharynx.
What coding notes are listed for C11?
No inclusion terms are listed for C11 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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