2019 ICD-10-CM Diagnosis Code C03.1

Malignant neoplasm of lower gum

The following code(s) above C03.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to C03.1:
  • C00-D49
    2019 ICD-10-CM Range C00-D49


    • Functional activity
    • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
    • Morphology [Histology]
    • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
    • Primary malignant neoplasms overlapping site boundaries
    • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
    • Malignant neoplasm of ectopic tissue
    • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
  • C03
    ICD-10-CM Diagnosis Code C03

    Malignant neoplasm of gum

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    • malignant neoplasm of alveolar (ridge) mucosa
    • malignant neoplasm of gingiva
    Type 2 Excludes
    Use Additional
    • code to identify:
    • alcohol abuse and dependence (F10.-)
    • history of tobacco dependence (Z87.891)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Malignant neoplasm of gum
Approximate Synonyms ICD-10-CM C03.1 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):

Convert C03.1 to ICD-9-CM

Code History
Code annotations containing back-references to C03.1:
ICD-10-CM Codes Adjacent To C03.1
C02 Malignant neoplasm of other and unspecified parts of tongue
C02.0 Malignant neoplasm of dorsal surface of tongue
C02.1 Malignant neoplasm of border of tongue
C02.2 Malignant neoplasm of ventral surface of tongue
C02.3 Malignant neoplasm of anterior two-thirds of tongue, part unspecified
C02.4 Malignant neoplasm of lingual tonsil
C02.8 Malignant neoplasm of overlapping sites of tongue
C02.9 Malignant neoplasm of tongue, unspecified
C03 Malignant neoplasm of gum
C03.0 Malignant neoplasm of upper gum
C03.1 Malignant neoplasm of lower gum
C03.9 Malignant neoplasm of gum, unspecified
C04 Malignant neoplasm of floor of mouth
C04.0 Malignant neoplasm of anterior floor of mouth
C04.1 Malignant neoplasm of lateral floor of mouth
C04.8 Malignant neoplasm of overlapping sites of floor of mouth
C04.9 Malignant neoplasm of floor of mouth, unspecified
C05 Malignant neoplasm of palate
C05.0 Malignant neoplasm of hard palate
C05.1 Malignant neoplasm of soft palate
C05.2 Malignant neoplasm of uvula

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.