2020 ICD-10-CM Diagnosis Code C03.0

Malignant neoplasm of upper gum

    2016 2017 2018 2019 2020 Billable/Specific Code
  • C03.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM C03.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of C03.0 - other international versions of ICD-10 C03.0 may differ.
The following code(s) above C03.0 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 C03.0:
  • C00-D49
    2020 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 2020 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
  • Cancer of the gum, upper
  • Primary malignant neoplasm of upper gum
  • Primary squamous cell carcinoma of upper gum
  • Squamous cell carcinoma, upper gum
ICD-10-CM C03.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 011 Tracheostomy for face, mouth & neck diagnoses or laryngectomy with mcc
  • 012 Tracheostomy for face, mouth & neck diagnoses or laryngectomy with cc
  • 013 Tracheostomy for face, mouth & neck diagnoses or laryngectomy without cc/mcc
  • 146 Ear, nose, mouth and throat malignancy with mcc
  • 147 Ear, nose, mouth and throat malignancy with cc
  • 148 Ear, nose, mouth and throat malignancy without cc/mcc

Convert C03.0 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to C03.0:
  • Type 2 Excludes: C41.0
    ICD-10-CM Diagnosis Code C41.0

    Malignant neoplasm of bones of skull and face

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Malignant neoplasm of maxilla (superior)
    • Malignant neoplasm of orbital bone
    Type 2 Excludes
    • carcinoma, any type except intraosseous or odontogenic of:
    • maxillary sinus (C31.0)
    • upper jaw (C03.0)
    • malignant neoplasm of jaw bone (lower) (C41.1)
ICD-10-CM Codes Adjacent To C03.0
C01 Malignant neoplasm of base of tongue
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

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