C03 ICD-10-CM Code: Malignant neoplasm of gum
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
C03Malignant neoplasm of gum
ICD-10-CM diagnosis code · United States clinical modification
Where C03 sits
- 1
Chapter 2
Neoplasms (C00-D49)
- 2
Section
Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
- 3
Category C03
Malignant neoplasm of gum
- 4
Code C03
Malignant neoplasm of gum
Codes under C03
C03 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for C03.
Code first
No “code first” instruction is listed for C03.
Use additional code
- code to identify:
- alcohol abuse and dependence (F10.-)
- history of tobacco dependence (Z87.891)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for C03.
Excludes2
Conditions not included here that may be reported separately when present.
- malignant odontogenic neoplasms (C41.0-C41.1)
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code C03 mean?
C03 is the FY 2027 U.S. ICD-10-CM code for “Malignant neoplasm of gum.”
Is C03 a billable or specific ICD-10-CM code?
No. C03 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is C03 located in ICD-10-CM?
C03 is listed in Chapter 2, Neoplasms (C00-D49), within Malignant neoplasms of lip, oral cavity and pharynx (C00-C14) (C00–C14), under category C03, Malignant neoplasm of gum.
What coding notes are listed for C03?
No inclusion terms are listed for C03 in this reference record. No code-first instruction is listed. Additional-code instructions: code to identify:; alcohol abuse and dependence (F10.-); history of tobacco dependence (Z87.891); tobacco dependence (F17.-); tobacco use (Z72.0). No Excludes1 note is listed. Excludes2 notes: malignant odontogenic neoplasms (C41.0-C41.1).