ICD-10 Diagnosis Code C06.9

Malignant neoplasm of mouth, unspecified

Diagnosis Code C06.9

ICD-10: C06.9
Short Description: Malignant neoplasm of mouth, unspecified
Long Description: Malignant neoplasm of mouth, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code C06.9

Valid for Submission
The code C06.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
      • Malignant neoplasm of other and unspecified parts of mouth (C06)

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 145.9 - Malig neoplasm mouth NOS

  • Malignant melanoma of oral cavity
  • Malignant tumor of minor salivary gland
  • Malignant tumor of oral cavity
  • Metastasis from malignant tumor of buccal cavity
  • Neoplasm of minor salivary gland
  • Primary malignant neoplasm of minor salivary gland
  • Primary malignant neoplasm of oral cavity
  • Squamous cell carcinoma of mouth
  • Verrucous carcinoma of oral cavity
  • Verrucous squamous cell carcinoma

Index of Diseases and Injuries
References found for the code C06.9 in the Index of Diseases and Injuries:

Table of Neoplasms

The code C06.9 is included in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

The Tabular must be reviewed for the complete diagnosis code.

Neoplasm, neoplastic Malignant
CaInSitu Benign Uncertain
»buccal (cavity)
»oral (cavity)
»salivary gland or duct (major)
  »minor NEC

Information for Patients

Oral Cancer

Oral cancer can form in any part of the mouth. Most oral cancers begin in the flat cells that cover the surfaces of your mouth, tongue, and lips. Anyone can get oral cancer, but the risk is higher if you are male, use tobacco, drink lots of alcohol, have HPV, or have a history of head or neck cancer. Frequent sun exposure is also a risk factor for lip cancer.

Symptoms of oral cancer include

  • White or red patches in your mouth
  • A mouth sore that won't heal
  • Bleeding in your mouth
  • Loose teeth
  • Problems or pain with swallowing
  • A lump in your neck
  • An earache

Tests to diagnose oral cancer include a physical exam, endoscopy, biopsy, and imaging tests. Oral cancer treatments may include surgery, radiation therapy, and chemotherapy. Some patients have a combination of treatments.

NIH: National Cancer Institute

  • Head and Neck Radiation Treatment and Your Mouth - NIH (National Institute of Dental and Craniofacial Research)
  • Leukoplakia (Medical Encyclopedia)
  • Oral cancer (Medical Encyclopedia)
  • Oral Cancer - NIH (National Institute of Dental and Craniofacial Research)
  • Swallowing problems (Medical Encyclopedia)
  • Tongue biopsy (Medical Encyclopedia)
  • Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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