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2025 ICD-10-CM code C44

Other and unspecified malignant neoplasm of skin, including sebaceous (oil) and sweat glands.This includes cancers such as basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), and other specified malignant neoplasms not represented by codes in other categories, as well as unspecified cancers.

Use additional codes to specify the histology (basal cell, squamous cell, etc.) and location of the lesion if known.Refer to ICD-10-CM guidelines for coding overlapping lesions.

Medical necessity for treatment is based on the diagnosis of malignant skin cancer, the potential for local invasion or metastasis, and the patient's overall health status.

Diagnosis is typically based on physical examination, patient history, and biopsy. Treatment options vary depending on the type and stage of the cancer and may include excision, curettage, cryosurgery, Mohs surgery, radiation therapy, and chemotherapy (topical or systemic).

In simple words: This code represents skin cancers that are not melanoma or Merkel cell carcinoma. It includes common types like basal cell and squamous cell carcinoma. These cancers usually develop on skin exposed to the sun.

This code encompasses malignant neoplasms of the skin that are not classified elsewhere, including those of sebaceous and sweat glands.It includes basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), among other less common skin cancers.These cancers typically arise in sun-exposed areas. BCC rarely metastasizes, while SCC has a higher potential for spread.

Example 1: A 65-year-old male presents with a pearly, translucent nodule on his forehead. Biopsy confirms basal cell carcinoma. Code C44.31 (Basal cell carcinoma of skin of face)., A 70-year-old female has a non-healing, ulcerated lesion on her arm.Biopsy reveals squamous cell carcinoma. Code C44.62 (Squamous cell carcinoma of skin of upper limb, including shoulder)., A patient is diagnosed with a malignant neoplasm of a sweat gland on the back. Code C44.59 (Other specified malignant neoplasm of skin of trunk).

Documentation should include location, size, and description of the lesion, biopsy results confirming the diagnosis, and treatment plan.Photographs may be helpful.

** Excludes: Kaposi's sarcoma (C46.-), malignant melanoma (C43.-), Merkel cell carcinoma (C4A.-)

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