2021 ICD-10-CM Code C44.509

Unspecified malignant neoplasm of skin of other part of trunk

Version 2021

Valid for Submission

C44.509 is a billable diagnosis code used to specify a medical diagnosis of unspecified malignant neoplasm of skin of other part of trunk. The code C44.509 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code C44.509 might also be used to specify conditions or terms like carcinoma of skin of trunk, malignant neoplasm of skin of abdominal wall, malignant neoplasm of skin of axillary fold, malignant neoplasm of skin of scapular region, malignant neoplasm of skin of trunk , malignant tumor of soft tissue of back, etc.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic abdomen, abdominal wall [See Also: Neoplasm, abdomen, wall, skin] ; Neoplasm, neoplastic axilla, axillary fold [See Also: Neoplasm, skin, trunk] ; Neoplasm, neoplastic nates [See Also: Neoplasm, skin, trunk] ; Neoplasm, neoplastic skin NOS abdominal wall ; Neoplasm, neoplastic skin NOS axilla, axillary fold [See Also: Neoplasm, skin, trunk] ; Neoplasm, neoplastic skin NOS back [See Also: Neoplasm, skin, trunk] ; Neoplasm, neoplastic skin NOS buttock [See Also: Neoplasm, skin, trunk] ; etc

Unspecified diagnosis codes like C44.509 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:C44.509
Short Description:Unsp malignant neoplasm of skin of other part of trunk
Long Description:Unspecified malignant neoplasm of skin of other part of trunk

Code Classification

Approximate Synonyms

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

Convert C44.509 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code C44.509 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

Table of Neoplasms

The code C44.509 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
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »axilla, axillary
    »fold [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »nates [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »abdominal wall
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »axilla, axillary fold [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »back [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »buttock [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »chest (wall) [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »clavicular area [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »flank [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »gluteal region [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »groin [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »infraclavicular region [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »inguinal region [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »nates [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »pubes [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »sacrococcygeal region [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »scapular region [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »submammary fold [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »thoracic wall [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »trunk
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »skin NOS
    »umbilicus [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »umbilicus, umbilical [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2

Information for Patients


Skin Cancer

Skin cancer is the most common form of cancer in the United States. The two most common types are basal cell cancer and squamous cell cancer. They usually form on the head, face, neck, hands, and arms. Another type of skin cancer, melanoma, is more dangerous but less common.

Anyone can get skin cancer, but it is more common in people who

You should have your doctor check any suspicious skin markings and any changes in the way your skin looks. Treatment is more likely to work well when cancer is found early. If not treated, some types of skin cancer cells can spread to other tissues and organs. Treatments include surgery, radiation therapy, chemotherapy, photodynamic therapy (PDT), and biologic therapy. PDT uses a drug and a type of laser light to kill cancer cells. Biologic therapy boosts your body's own ability to fight cancer.

NIH: National Cancer Institute


[Learn More in MedlinePlus]

Code History

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