C06.9 – Malignant neoplasm of mouth, unspecified

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lip, oral cavity and pharynx

Billable code

ICD-10-CM code C06.9

Code: C06.9 (claims format: C069)
Description: Malignant neoplasm of mouth, unspecified
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: C00-C14 Malignant neoplasms of lip, oral cavity and pharynx
Parent codes: C06

Notes for C06.9

Applicable to:

Malignant neoplasm of minor salivary gland, unspecified site
Malignant neoplasm of oral cavity NOS

Notes inherited from parent codes

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

C06 – Malignant neoplasm of other and unspecified parts of mouth

Use additional code:

code to identify:
alcohol abuse and dependence (F10.-)
history of tobacco dependence (Z87.891)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Related codes in C06

Frequently asked questions

What is ICD-10 code C06.9?

C06.9 is the ICD-10-CM code for malignant neoplasm of mouth, unspecified, in the block C00-C14 (Malignant neoplasms of lip, oral cavity and pharynx).

Is C06.9 a billable code?

Yes. C06.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C06.9 belong to?

It belongs to category C06 – Malignant neoplasm of other and unspecified parts of mouth.

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.