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ICD-10 Guide
ICD-10 CodesC44.799

C44.799

Billable

Other specified malignant neoplasm of skin of left lower limb, including hip

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 C44.799 is a billable code used to indicate a diagnosis of other specified malignant neoplasm of skin of left lower limb, including hip.

Key Diagnostic Point:

C44.799 refers to a malignant neoplasm of the skin located specifically on the left lower limb, including the hip region. This code encompasses various types of skin cancers that do not fall under more specific categories. Skin cancers can arise from different cell types, including squamous cells, basal cells, and melanocytes. Factors such as sun exposure, particularly UV radiation, play a significant role in the development of these malignancies. Surgical intervention often involves excision of the tumor with clear margins to ensure complete removal and minimize recurrence. Reconstruction may be necessary depending on the size and location of the excised lesion, which can involve techniques such as skin grafts or flap surgeries. Accurate coding is essential for proper treatment planning and reimbursement, as well as for tracking cancer incidence and outcomes.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of skin cancer types that can be coded under this category
  • Need for precise documentation of tumor location and characteristics
  • Variability in surgical margins and reconstruction techniques
  • Potential for multiple malignancies in the same patient

Audit Risk Factors

  • Inadequate documentation of tumor type and characteristics
  • Failure to document surgical margins and reconstruction details
  • Misclassification of benign lesions as malignant
  • Inconsistent coding practices among different providers

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the lesion, including size, location, and histological type.

Common Clinical Scenarios

Diagnosis and treatment of skin cancers, including Mohs micrographic surgery.

Billing Considerations

Ensure clear documentation of margins and any reconstruction performed.

Oncology

Documentation Requirements

Comprehensive treatment plans, including chemotherapy or radiation therapy details.

Common Clinical Scenarios

Management of advanced skin cancers requiring systemic therapy.

Billing Considerations

Document staging and any metastasis for accurate coding.

Coding Guidelines

Inclusion Criteria

Use C44.799 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used only when the malignancy is confirmed and documented

Exclusion Criteria

Do NOT use C44.799 When
  • Exclude conditions that are not malignant or do not meet the criteria for this specific code

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Excision, malignant skin lesion

Clinical Scenario

Used when excising a malignant neoplasm from the left lower limb.

Documentation Requirements

Document size, location, and margins of the excised lesion.

Specialty Considerations

Dermatologists should ensure detailed operative notes.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of skin cancers, improving data accuracy and treatment tracking. C44.799 provides a means to capture specific malignancies that may have been coded more generally in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, improving data accuracy and treatment tracking. C44.799 provides a means to capture specific malignancies that may have been coded more generally in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of skin cancers, improving data accuracy and treatment tracking. C44.799 provides a means to capture specific malignancies that may have been coded more generally in ICD-9.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What types of skin cancers are included under C44.799?

C44.799 includes various malignant neoplasms of the skin, such as squamous cell carcinoma, basal cell carcinoma, and other specified types that do not have a more specific code.