ICD-10-CM Code C04.9

Malignant neoplasm of floor of mouth, unspecified

Version 2021 Billable Code Neoplasm Malignant Primary

Valid for Submission

C04.9 is a billable code used to specify a medical diagnosis of malignant neoplasm of floor of mouth, unspecified. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code C04.9 might also be used to specify conditions or terms like carcinoma of floor of mouth, malignant melanoma of floor of mouth, malignant tumor of floor of mouth, primary malignant neoplasm of floor of mouth, squamous cell carcinoma of floor of mouth, squamous cell carcinoma of oral mucous membrane, etc

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic mouth floor or Neoplasm, neoplastic sublingual .

ICD-10:C04.9
Short Description:Malignant neoplasm of floor of mouth, unspecified
Long Description:Malignant neoplasm of floor of mouth, unspecified

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Carcinoma of floor of mouth
  • Malignant melanoma of floor of mouth
  • Malignant tumor of floor of mouth
  • Primary malignant neoplasm of floor of mouth
  • Squamous cell carcinoma of floor of mouth
  • Squamous cell carcinoma of oral mucous membrane

Convert C04.9 to ICD-9

  • 144.9 - Mal neo mouth floor NOS

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
      • Malignant neoplasm of floor of mouth (C04)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Table of Neoplasms

The code C04.9 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.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»Neoplasm, neoplastic
  »mouth
    »floor
C04.9C79.89D00.06D10.2D37.09D49.0
»Neoplasm, neoplastic
  »sublingual
C04.9C79.89D00.06D10.2D37.09D49.0

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

  • Leukoplakia (Medical Encyclopedia)
  • Oral cancer (Medical Encyclopedia)
  • Swallowing problems (Medical Encyclopedia)
  • Tongue biopsy (Medical Encyclopedia)

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