ICD-10-CM Code C44.721

Squamous cell carcinoma of skin of unspecified lower limb, including hip

Version 2021 Billable Code

Valid for Submission

C44.721 is a billable code used to specify a medical diagnosis of squamous cell carcinoma of skin of unspecified lower limb, including hip. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code C44.721 might also be used to specify conditions or terms like intraepidermal squamous carcinoma of leg, plantar verrucous carcinoma, primary malignant neoplasm of skin of foot, squamous cell carcinoma of foot, squamous cell carcinoma of skin of lower extremity, verrucous squamous cell carcinoma, etc

Short Description:Squamous cell carcinoma skin/ unsp lower limb, including hip
Long Description:Squamous cell carcinoma of skin of unspecified lower limb, including hip


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Intraepidermal squamous carcinoma of leg
  • Plantar verrucous carcinoma
  • Primary malignant neoplasm of skin of foot
  • Squamous cell carcinoma of foot
  • Squamous cell carcinoma of skin of lower extremity
  • Verrucous squamous cell carcinoma

Diagnostic Related Groups

The ICD-10 code C44.721 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 C44.721 to ICD-9

  • 173.72 - Sqam cell ca skn low lmb (Approximate Flag)

Code Classification

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

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

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]