ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesC44.500

C44.500

Billable

Unspecified malignant neoplasm of anal skin

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

Code Description

ICD-10 C44.500 is a billable code used to indicate a diagnosis of unspecified malignant neoplasm of anal skin.

Key Diagnostic Point:

C44.500 refers to an unspecified malignant neoplasm of the anal skin, which encompasses a variety of skin cancers that may arise in the anal region. These neoplasms can include squamous cell carcinoma, basal cell carcinoma, and melanoma, among others. The anal skin is particularly susceptible to malignancies due to factors such as sun exposure, HPV infection, and chronic irritation. Diagnosis typically involves a thorough clinical examination, biopsy, and histopathological evaluation to confirm malignancy. Treatment options may include surgical excision, Mohs micrographic surgery, or radiation therapy, depending on the tumor's size, location, and histological type. Surgical margins are critical in ensuring complete removal of the cancerous tissue, and reconstruction may be necessary to restore the anal area's function and appearance post-surgery. Accurate coding is essential for appropriate reimbursement and tracking of cancer incidence, making it vital for coders to understand the nuances of this diagnosis.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in histological types of skin cancers
  • Need for precise documentation of surgical margins
  • Potential for reconstruction procedures post-excision
  • Differentiation from benign skin lesions

Audit Risk Factors

  • Inadequate documentation of tumor type
  • Failure to document surgical margins
  • Lack of clarity on treatment plans
  • Misclassification of benign versus malignant lesions

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, treatment plans, and follow-up notes.

Common Clinical Scenarios

Diagnosis and treatment of anal skin cancers, management of surgical complications.

Billing Considerations

Ensure accurate staging and grading of tumors for appropriate coding.

Dermatology

Documentation Requirements

Comprehensive skin examination findings, biopsy results, and treatment documentation.

Common Clinical Scenarios

Skin cancer screenings, excisions, and Mohs surgery.

Billing Considerations

Document the specific type of skin cancer and any associated risk factors.

Coding Guidelines

Inclusion Criteria

Use C44.500 When
  • Follow the official ICD
  • CM coding guidelines, ensuring to document the specific type of malignancy when known
  • Include details about the treatment received and any relevant surgical margins

Exclusion Criteria

Do NOT use C44.500 When
  • Exclude codes for benign conditions and ensure that the diagnosis aligns with the clinical documentation

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Excision, malignant skin lesion

Clinical Scenario

Used when excising a malignant anal skin lesion.

Documentation Requirements

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

Specialty Considerations

Oncologists must ensure accurate staging and follow-up care.

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 the accuracy of data collection and reimbursement processes. C44.500 provides a broad category for unspecified malignant neoplasms, which can help in tracking cancer incidence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, improving the accuracy of data collection and reimbursement processes. C44.500 provides a broad category for unspecified malignant neoplasms, which can help in tracking cancer incidence and treatment outcomes.

Reimbursement & Billing Impact

reimbursement processes. C44.500 provides a broad category for unspecified malignant neoplasms, which can help in tracking cancer incidence and treatment outcomes.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the significance of documenting surgical margins?

Documenting surgical margins is crucial as it indicates whether the cancer has been completely excised. Positive margins may require further treatment, while negative margins suggest complete removal.