2024 ICD-10-CM Diagnosis Code C44.99

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 of skin
• Angiosarcoma of skin
• Apocrine adenocarcinoma of skin
• Basal cell carcinoma with eccrine differentiation
• Basosquamous carcinoma of skin
• Basosquamous carcinoma of skin
• Carcinosarcoma of skin
• Clear cell eccrine hidradenocarcinoma
• Cutaneous fibrosarcoma
• 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 ductal carcinoma
• Eccrine porocarcinoma
• Epithelioid cell sarcoma of skin
• Epithelioid sarcoma
• Epithelioid sarcoma
• Extramammary Paget's disease of skin
• Giant cell malignant fibrous histiocytoma of skin
• Infantile fibrosarcoma
• Inflammatory malignant fibrous histiocytoma 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
• Metastatic basal cell carcinoma
• Metastatic basosquamous cell carcinoma to skin
• Microcystic adnexal carcinoma
• Mixed eccrine/pilar adnexal carcinoma of skin
• Mucinous eccrine carcinoma of skin
• Mucoepidermoid carcinoma of skin
• Muir-Torré syndrome
• Myxofibrosarcoma of skin
• Myxoid dermatofibrosarcoma protuberans
• Peripheral neuroepithelioma
• Pigmented dermatofibrosarcoma protuberans of skin
• Pilomatrix carcinoma of skin
• Pleomorphic malignant fibrous histiocytoma of skin
• Primary adenocarcinoma of skin
• Primary adenoid cystic eccrine carcinoma of skin
• Primary adnexal carcinoma of skin
• Primary apocrine adenocarcinoma of skin
• Primary carcinosarcoma of skin
• Primary clear cell eccrine hidradenocarcinoma
• Primary cutaneous fibrosarcoma
• Primary digital papillary eccrine carcinoma of skin
• Primary eccrine carcinoma of skin
• Primary eccrine ductal carcinoma
• Primary eccrine porocarcinoma
• Primary epithelioid cell sarcoma of skin
• Primary giant cell malignant fibrous histiocytoma of skin
• Primary infantile fibrosarcoma
• Primary inflammatory malignant fibrous histiocytoma of skin
• Primary malignant chondroid syringoma
• Primary malignant eccrine spiradenoma
• Primary malignant fibrous histiocytoma 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 neoplasm of sweat gland
• Primary malignant sarcoma of skin
• Primary microcystic adnexal carcinoma
• Primary mixed eccrine/pilar adnexal carcinoma of skin
• Primary mucinous eccrine carcinoma of skin
• Primary mucoepidermoid carcinoma of skin
• Primary myxofibrosarcoma
• Primary myxofibrosarcoma of skin
• Primary pleomorphic malignant fibrous histiocytoma of skin
• Primary sebaceous adenocarcinoma
• Primary signet ring cell carcinoma of skin
• Primary small cell eccrine carcinoma
• Primary superficial malignant fibrous histiocytoma of skin
• Primary undifferentiated adnexal carcinoma of skin
• Sebaceous adenocarcinoma
• Small cell eccrine carcinoma
• Superficial malignant fibrous histiocytoma of skin
• Torré-Muir syndrome co-occurrent with malignant sebaceous neoplasm
• Trichilemmal carcinoma
• Undifferentiated adnexal carcinoma of skin

Clinical Information

• Eccrine Porocarcinoma

  a rare malignant neoplasm of the sweat glands. it most often develops as a form of degenerative progression from a benign eccrine poroma.

• Myxoid Dermatofibrosarcoma Protuberans

  a morphologic variant of dermatofibrosarcoma protuberans characterized by the presence of extensive myxoid stroma formation and a storiform growth pattern.

• Metastatic Basal Cell Carcinoma

  a carcinoma that arises from the basal cells and has metastasized to another anatomic site.

C44.99 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
606	MINOR SKIN DISORDERS WITH MCC	09	1.5858
607	MINOR SKIN DISORDERS WITHOUT MCC	09	0.8935

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert C44.99 to ICD-9-CM

• ICD-9-CM Code: 173.99 - Oth mal neo skn site NOS

Table of Neoplasms

This code is referenced 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.

Filter table of neoplasms:

Neoplasm, neoplastic	Malignant Primary	Malignant Secondary	CaInSitu	Benign	Uncertain Behavior	Unspecified Behavior
»Neoplasm, neoplastic   »skin NOS     »specified type NEC	C44.99

Patient Education

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

[Learn More in MedlinePlus]

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.