ICD-10 Diagnosis Code D04.9

Carcinoma in situ of skin, unspecified

Diagnosis Code D04.9

ICD-10: D04.9
Short Description: Carcinoma in situ of skin, unspecified
Long Description: Carcinoma in situ of skin, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code D04.9

Valid for Submission
The code D04.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • In situ neoplasms (D00-D09)
      • Carcinoma in situ of skin (D04)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code D04.9 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.

  • Bowen's disease, atrophic
  • Bowen's disease, clear cell
  • Bowen's disease, clonal
  • Bowen's disease, pagetoid
  • Bowen's disease, pigmented
  • Bowen's disease, psoriasiform
  • Bowen's disease, verrucous
  • Carcinoma in situ of adnexa of skin
  • Carcinoma in situ of epidermal appendage
  • Carcinoma in situ of sebaceous gland
  • Carcinoma in situ of skin
  • Carcinoma in situ of surface epithelium
  • Carcinoma in situ of sweat gland
  • Multiple intraepidermal squamous carcinomata
  • Neoplasm of sweat gland
  • Squamous cell carcinoma in situ of skin
  • Tumor of skin with sebaceous differentiation

Table of Neoplasms

The code D04.9 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
»connective tissue NEC
  »skin (dermis) NEC [See Also: Neoplasm, skin, by site]
»nail [See Also: Neoplasm, skin, limb]
»scar NEC [See Also: Neoplasm, skin, by site]
»skin NOS
»skin NOS
  »limb NEC
»sudoriferous, sudoriparous gland, site unspecified
»sweat gland (apocrine) (eccrine), site unspecified

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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