ICD-10 Diagnosis Code C44.99

Other specified malignant neoplasm of skin, unspecified

Diagnosis Code C44.99

ICD-10: C44.99
Short Description: Other specified malignant neoplasm of skin, unspecified
Long Description: Other specified malignant neoplasm of skin, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code C44.99

Valid for Submission
The code C44.99 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Melanoma and other malignant neoplasms of skin (C43-C44)
      • Other and unspecified malignant neoplasm of skin (C44)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code C44.99 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


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.
  • 173.99 - Oth mal neo skn site NOS

  • Adenoid cystic eccrine carcinoma of skin
  • 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 of skin
  • 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 of skin
  • Epithelioid cell sarcoma of skin
  • Extramammary Paget's disease of skin
  • Localized malignant reticulohistiocytoma
  • Lymphoepithelial tumor of skin
  • Malignant chondroid syringoma of skin
  • Malignant cylindroma of skin
  • Malignant eccrine spiradenoma of skin
  • 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 of skin
  • Mixed eccrine/pilar adnexal carcinoma of skin
  • Mucinous eccrine carcinoma of skin
  • Mucoepidermoid carcinoma of skin
  • Myxoid dermatofibrosarcoma protuberans
  • Peripheral neuroepithelioma
  • Pigmented dermatofibrosarcoma protuberans of skin
  • Pilomatrix carcinoma of skin
  • Primary adenocarcinoma of skin
  • Primary signet ring carcinoma of skin
  • Sebaceous adenocarcinoma
  • Small cell eccrine carcinoma of skin
  • Torré-Muir syndrome
  • Torré-Muir syndrome co-occurrent with malignant sebaceous neoplasm
  • Trichilemmal carcinoma
  • Tumor of skin with sebaceous differentiation
  • Tumor of skin with sebaceous differentiation

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.

The Tabular must be reviewed for the complete diagnosis code.

Neoplasm, neoplastic Malignant
CaInSitu Benign Uncertain
»skin NOS
  »specified type NEC

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)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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