C03.9 – Malignant neoplasm of gum, unspecified

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

Billable code

ICD-10-CM code C03.9
Code
C03.9 (claims format: C039)
Description
Malignant neoplasm of gum, 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
C03

Notes inherited from parent codes

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

C03 – Malignant neoplasm of gum

Includes:
  • malignant neoplasm of alveolar (ridge) mucosa
  • malignant neoplasm of gingiva
Excludes2 (not included here):
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 C03

Frequently asked questions

What is ICD-10 code C03.9?

C03.9 is the ICD-10-CM code for malignant neoplasm of gum, unspecified, in the block C00-C14 (Malignant neoplasms of lip, oral cavity and pharynx).

Is C03.9 a billable code?

Yes. C03.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C03.9 belong to?

It belongs to category C03 – Malignant neoplasm of gum.

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.