Malignant neoplasm of pyriform sinus (C12) ICD-10-CM
The C12 code range covers malignant neoplasm of pyriform sinus with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Malignant neoplasm of pyriform fossa
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Codes in the C12 Range 1 codes · 1 billable
- C12 Malignant neoplasm of pyriform sinus
About the C12 Code Range
The ICD-10 code C12 is used to identify a malignant tumor located in the pyriform sinus, a part of the hypopharynx. This code captures cancers specifically arising in this anatomical region.
Malignant neoplasm of pyriform sinus refers to cancer affecting the pyriform fossa, often called by several synonyms such as carcinoma of pyriform fossa, squamous cell carcinoma of piriform sinus, or primary squamous cell carcinoma of the hypopharynx. These terms describe the same condition that involves cancerous growths in the lower throat area surrounding the larynx. The ICD-10 code for this condition ensures precise classification of head and neck cancers, particularly those arising from squamous cells in this specific site. Healthcare providers and medical coders rely on code C12 to document, track, and manage treatment for this type of primary malignant tumor, facilitating clear communication and accurate billing in oncology care related to hypopharyngeal cancer.
Questions About This Page
How many billable codes are in the C12 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the C12 range classify?
The range classifies malignant neoplasm of pyriform sinus. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
