C31.0 – Malignant neoplasm of maxillary sinus

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of respiratory and intrathoracic organs

Billable code

ICD-10-CM code C31.0
Code
C31.0 (claims format: C310)
Description
Malignant neoplasm of maxillary sinus
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C30-C39 Malignant neoplasms of respiratory and intrathoracic organs
Parent codes
C31

Notes for C31.0

Applicable to:
  • Malignant neoplasm of antrum (Highmore) (maxillary)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C30-C39

Includes:
  • malignant neoplasm of middle ear
Excludes1 (not coded here):
  • mesothelioma (C45.-)

Related codes in C31

Frequently asked questions

What is ICD-10 code C31.0?

C31.0 is the ICD-10-CM code for malignant neoplasm of maxillary sinus, in the block C30-C39 (Malignant neoplasms of respiratory and intrathoracic organs).

Is C31.0 a billable code?

Yes. C31.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C31.0 belong to?

It belongs to category C31 – Malignant neoplasm of accessory sinuses.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.