Category C31
Non-Billable Category
FY2027 Dataset
C31: Malignant neoplasm of accessory sinuses
Parent Chapter: Chapter 2: Neoplasms
Notice on Coding Specificity: Category C31 is a 3-character heading and cannot be reported directly on healthcare claims. You must assign one of the specific child codes listed below.
Specific Child Codes in Category C31
| Code | Official Descriptor | Status | Action |
|---|---|---|---|
| C31.0 | Malignant neoplasm of maxillary sinus | Billable Code | View Code |
| C31.1 | Malignant neoplasm of ethmoidal sinus | Billable Code | View Code |
| C31.2 | Malignant neoplasm of frontal sinus | Billable Code | View Code |
| C31.3 | Malignant neoplasm of sphenoid sinus | Billable Code | View Code |
| C31.8 | Malignant neoplasm of overlapping sites of accessory sinuses | Billable Code | View Code |
| C31.9 | Malignant neoplasm of accessory sinus, unspecified | Billable Code | View Code |
| C31 | Malignant neoplasm of accessory sinuses | Non-Billable | View Code |