ICD-10-CM C06: Malignant neoplasm of other and unspecified parts of mouth

ICD-10-CM Diagnosis Code (2025)

Official Description for C06

Malignant neoplasm of other and unspecified parts of mouth

Coding Notes & Guidelines for C06

Use Additional Code
  • code to identify:
  • alcohol abuse and dependence (F10.-)
  • history of tobacco dependence (Z87.891)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)
Inclusion Terms
  • Malignant neoplasm of buccal mucosa NOS
  • Malignant neoplasm of internal cheek
Inclusion Terms
  • Malignant neoplasm of buccal sulcus (upper) (lower)
  • Malignant neoplasm of labial sulcus (upper) (lower)
Inclusion Terms

'book leaf' neoplasm [ventral surface of tongue and floor of mouth]

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

Child Codes (More Specific Codes for C06):

C06.0 - Malignant neoplasm of cheek mucosa C06.1 - Malignant neoplasm of vestibule of mouth C06.2 - Malignant neoplasm of retromolar area C06.8 - Malignant neoplasm of overlapping sites of other and unspecified parts of mouth C06.80 - Malignant neoplasm of overlapping sites of unspecified parts of mouth C06.89 - Malignant neoplasm of overlapping sites of other parts of mouth C06.9 - Malignant neoplasm of mouth, unspecified

About ICD-10-CM Code C06 (Malignant neoplasm of other and unspecified parts of mouth)

ICD-10-CM code C06 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C06 became effective on October 1, 2024.

This page provides detailed information about C06 - Malignant neoplasm of other and unspecified parts of mouth. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Malignant neoplasm of other and unspecified parts of mouth.