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ICD-10 Guide
ICD-10 CodesC44.40

C44.40

Billable

Unspecified malignant neoplasm of skin of scalp and neck

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

Code Description

ICD-10 C44.40 is a billable code used to indicate a diagnosis of unspecified malignant neoplasm of skin of scalp and neck.

Key Diagnostic Point:

C44.40 refers to an unspecified malignant neoplasm of the skin located on the scalp and neck. This code is used when a patient presents with a skin cancer diagnosis that does not specify the type of malignancy, such as basal cell carcinoma, squamous cell carcinoma, or melanoma. Skin cancers in these regions are often associated with significant sun exposure, which is a major risk factor. The scalp and neck are particularly vulnerable areas due to their exposure to ultraviolet (UV) radiation. Surgical treatment often involves excision of the tumor with clear margins to ensure complete removal of malignant cells. Reconstruction may be necessary depending on the size and location of the excised area, which can involve various techniques such as skin grafts or local flaps. Accurate coding is essential for proper treatment planning and reimbursement, as well as for tracking the incidence of skin cancers in these high-risk areas.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of skin cancer types
  • Need for precise surgical margin descriptions
  • Potential for multiple neoplasms in the same area
  • Variability in reconstruction techniques

Audit Risk Factors

  • Inadequate documentation of tumor type
  • Failure to document surgical margins
  • Lack of clarity on reconstruction procedures
  • Inconsistent coding of multiple lesions

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed pathology reports, surgical notes, and follow-up care documentation.

Common Clinical Scenarios

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

Billing Considerations

Ensure clear documentation of margins and type of malignancy for accurate coding.

Oncology

Documentation Requirements

Comprehensive treatment plans, staging information, and follow-up assessments.

Common Clinical Scenarios

Management of skin cancer patients undergoing chemotherapy or radiation therapy.

Billing Considerations

Document all treatment modalities and patient responses to ensure proper coding.

Coding Guidelines

Inclusion Criteria

Use C44.40 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used only when the specific type of malignant neoplasm is not documented
  • Include any relevant clinical information that supports the diagnosis

Exclusion Criteria

Do NOT use C44.40 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Excision, malignant skin lesion

Clinical Scenario

Used when excising a malignant lesion on the scalp or neck.

Documentation Requirements

Document the size of the lesion and margins.

Specialty Considerations

Dermatologists should ensure clear documentation of the lesion type and surgical technique.

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, but C44.40 remains a catch-all for unspecified cases, which can complicate treatment and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, but C44.40 remains a catch-all for unspecified cases, which can complicate treatment and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

When should I use C44.40?

Use C44.40 when a malignant neoplasm of the skin on the scalp or neck is documented, but the specific type of cancer is not specified in the medical record.