C11.1 MALIGNANT NEOPLASM OF POSTERIOR WALL OF NASOPHARYNX

Home > ICD-10 List > Neoplasms > Malignant neoplasms of lip, oral cavity and pharynx (C00-C14) > Malignant neoplasm of nasopharynx (C11) > C11.1

Code Information

Diagnosis Code: C11.1

Short Description: Malignant neoplasm of posterior wall of nasopharynx

Long Description: Malignant neoplasm of posterior wall of nasopharynx

The code C11.1 is VALID for claim submission

Code Classification:

Neoplasms (C00–D49)
- Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
  - Malignant neoplasm of nasopharynx (C11)
    - C11.1 Malignant neoplasm of posterior wall of nasopharynx

Code Version: 2022 ICD-10-CM

Synonyms

Adenoid squamous cell carcinoma of nasopharynx
Malignant tumor of adenoid
Malignant tumor of posterior wall of nasopharynx
Neoplasm of adenoid
Neoplasm of adenoid
Neoplasm of adenoid
Primary malignant neoplasm of adenoid
Primary malignant neoplasm of posterior wall of nasopharynx
Primary malignant neoplasm of Waldeyer's ring
Primary malignant neoplasm of Waldeyer's ring
Primary squamous cell carcinoma of pharyngeal tonsil
Primary squamous cell carcinoma of posterior wall of nasopharynx
Primary squamous cell carcinoma of Waldeyer ring
Squamous cell carcinoma of posterior wall of nasopharynx

References to Index of Diseases and Injuries

The code C11.1 has the following ICD-10-CM references to the Index of Diseases and Injuries

Inclusion Terms:
- Malignant neoplasm of adenoid
- Malignant neoplasm of pharyngeal tonsil

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
C11.1		147.1	Mal neo post nasopharynx

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
C11	Malignant neoplasm of nasopharynx
C11.0	Malignant neoplasm of superior wall of nasopharynx
C11.2	Malignant neoplasm of lateral wall of nasopharynx
C11.3	Malignant neoplasm of anterior wall of nasopharynx
C11.8	Malignant neoplasm of overlapping sites of nasopharynx
C11.9	Malignant neoplasm of nasopharynx, unspecified

This page was last updated on: 10/1/2023

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