ICD-10-CM Diagnosis Code C12 - Malignant neoplasm of pyriform sinus (original) (raw)

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Malignant neoplasm of pyriform sinus

ICD-10-CM Code:

C12

ICD-10 Code for:

Malignant neoplasm of pyriform sinus

Is Billable?

Yes - Valid for Submission

Chronic Condition Indicator: [1]

Chronic

Code Navigator:

C12 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of pyriform sinus. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic fossa (of) piriform ; Neoplasm, neoplastic fossa (of) pyriform ; Neoplasm, neoplastic hypopharynx, hypopharyngeal NEC pyriform fossa (sinus) ; Neoplasm, neoplastic piriform fossa or sinus ; Neoplasm, neoplastic pyriform fossa or sinus ; Neoplasm, neoplastic sinus (accessory) pyriform ; etc

  1. Code Information
  2. Approximate Synonyms
  3. Clinical Classification
  4. Tabular List of Diseases and Injuries
  5. Diagnostic Related Groups Mapping
  6. Convert to ICD-9 Code
  7. Table of Neoplasms
  8. Patient Education
  9. Code History

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

CCSR Code: NEO006

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-CM: 148.1

This is a direct match with no additional mapping qualifiers. The absence of a flag generally means the mapping is considered exact or precise. In other words, the ICD-10 code maps cleanly to the ICD-9 code without qualification, approximation, or needing multiple codes.

This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Filter table of neoplasms:

Neoplasm, neoplastic Malignant Primary Malignant Secondary CaInSitu Benign Uncertain Behavior Unspecified Behavior
»Neoplasm, neoplastic »fossa (of) »piriform C12 C79.89 D00.08 D10.7 D37.05 D49.0
»Neoplasm, neoplastic »fossa (of) »pyriform C12 C79.89 D00.08 D10.7 D37.05 D49.0
»Neoplasm, neoplastic »hypopharynx, hypopharyngeal NEC »pyriform fossa (sinus) C12 C79.89 D00.08 D10.7 D37.05 D49.0
»Neoplasm, neoplastic »piriform fossa or sinus C12 C79.89 D00.08 D10.7 D37.05 D49.0
»Neoplasm, neoplastic »pyriform fossa or sinus C12 C79.89 D00.08 D10.7 D37.05 D49.0
»Neoplasm, neoplastic »sinus (accessory) »pyriform C12 C79.89 D00.08 D10.7 D37.05 D49.0

Throat Cancer

Throat cancer is a type of head and neck cancer. Throat cancer has different names, depending on which part of the throat is affected. The different parts of your throat are called the oropharynx, the hypopharynx, the nasopharynx, and the larynx, or voice box.

The main risk factors for throat cancer are tobacco use and heavy drinking. Certain types of throat cancer also have other risk factors. For example, having HPV is a risk factor for oropharyngeal cancer.

Symptoms of throat cancer may include:

To diagnose throat cancers, doctors may do a physical exam and history, imaging tests, and a biopsy. You may also need other tests, depending on the type of cancer. Treatments include surgery, radiation therapy, and chemotherapy. Treatment for some types of throat cancer may also include targeted therapy. Targeted therapy uses drugs or other substances that attack specific cancer cells with less harm to normal cells.

NIH: National Cancer Institute

[Learn More in MedlinePlus]