2021 ICD-10-CM Code C44.99
Other specified malignant neoplasm of skin, unspecified
Valid for Submission
C44.99 is a billable diagnosis code used to specify a medical diagnosis of other specified malignant neoplasm of skin, unspecified. The code C44.99 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 C44.99 might also be used to specify conditions or terms like adenoid cystic eccrine carcinoma, angiosarcoma, angiosarcoma of skin, apocrine adenocarcinoma of skin, basal cell carcinoma with eccrine differentiation , basosquamous carcinoma of skin, etc.
The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic skin NOS specified type NEC .
Unspecified diagnosis codes like C44.99 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: | C44.99 |
| Short Description: | Other specified malignant neoplasm of skin, unspecified |
| Long Description: | Other specified malignant neoplasm of skin, unspecified |
Code Classification
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code C44.99 are found in the index:
- - Adenocarcinoma - See Also: Neoplasm, malignant, by site;
- - apocrine
- - unspecified site - C44.99
- - apocrine
- - Carcinoma (malignant) - See Also: Neoplasm, by site, malignant;
- - apocrine
- - unspecified site - C44.99
- - apocrine
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Adenoid cystic eccrine carcinoma
- Angiosarcoma
- Angiosarcoma of skin
- Apocrine adenocarcinoma of skin
- Basal cell carcinoma with eccrine differentiation
- Basosquamous carcinoma of skin
- Carcinosarcoma of skin
- Clear cell eccrine hidradenocarcinoma
- Dermatofibrosarcoma protuberans
- Dermatofibrosarcoma protuberans with giant cell fibroblastoma
- Dermatofibrosarcoma protuberans with granular cell change
- Dermatofibrosarcoma protuberans with myoid differentiation
- Digital papillary eccrine carcinoma of skin
- Eccrine carcinoma of skin
- Eccrine porocarcinoma
- Epithelioid cell sarcoma of skin
- Epithelioid sarcoma
- Extramammary Paget's disease of skin
- Localized malignant reticulohistiocytoma
- Lymphoepithelial tumor of skin
- Malignant chondroid syringoma
- Malignant cylindroma
- Malignant eccrine spiradenoma
- Malignant fibrohistiocytic tumor of skin
- Malignant hemangiopericytoma of skin
- Malignant skin tumor with apocrine differentiation
- Malignant tumor of skin with pilar differentiation
- Microcystic adnexal carcinoma
- Mixed eccrine/pilar adnexal carcinoma of skin
- Mucinous eccrine carcinoma
- Mucoepidermoid carcinoma of skin
- Muir-Torré syndrome
- Myxoid dermatofibrosarcoma protuberans
- Peripheral neuroepithelioma
- Pigmented dermatofibrosarcoma protuberans of skin
- Pilomatrix carcinoma of skin
- Primary adenocarcinoma of skin
- Primary adnexal carcinoma of skin
- Primary malignant neoplasm of sebaceous gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant neoplasm of sweat gland
- Primary malignant sarcoma of skin
- Primary signet ring cell carcinoma of skin
- Sebaceous adenocarcinoma
- Small cell eccrine carcinoma
- Torré-Muir syndrome co-occurrent with malignant sebaceous neoplasm
- Trichilemmal carcinoma
- Tumor of skin with sebaceous differentiation
- Tumor of skin with sebaceous differentiation
Diagnostic Related Groups - MS-DRG Mapping
The ICD-10 code C44.99 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2020 through 09/30/2021.
Convert C44.99 to ICD-9 Code
- 173.99 - Oth mal neo skn site NOS
Table of Neoplasms
The code C44.99 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 »skin NOS »specified type NEC | C44.99 |
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
- Spend a lot of time in the sun or have been sunburned
- Have light-colored skin, hair and eyes
- Have a family member with skin cancer
- Are over age 50
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
- Basal cell carcinoma (Medical Encyclopedia)
- Mohs micrographic surgery (Medical Encyclopedia)
- Skin lesion biopsy (Medical Encyclopedia)
- Skin self-exam (Medical Encyclopedia)
- Squamous cell skin cancer (Medical Encyclopedia)
[Learn More]
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)