Billable / Specific Code
ICD-10-CM C11.1 is the diagnosis code for Malignant neoplasm of posterior wall of nasopharynx. This code falls under the section "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 — Neoplasms (C00-D49). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where C11.1 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C11.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C11.1 is the ICD-10-CM diagnosis code for "Malignant neoplasm of posterior wall of nasopharynx". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of C11.1 is C11 ("Malignant neoplasm of nasopharynx"). C11.1 provides a more specific classification within this category.
C11.1 is located in Section C00-C14 — "Malignant neoplasms of lip, oral cavity and pharynx" within Chapter 2 of the ICD-10-CM Tabular List.
C11.1 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use C11.1 when the patients documented diagnosis matches "Malignant neoplasm of posterior wall of nasopharynx" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Malignant neoplasm of posterior wall of nasopharynx is C11.1.
Yes, C11.1 can be used as a primary diagnosis code since it is billable and specific.
C11.1 is in Chapter 2 of the ICD-10-CM Tabular List.
Yes, C11.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.