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ICD-10 Guide
ICD-10 CodesC44.590

C44.590

Billable

Other specified malignant neoplasm of anal skin

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

Code Description

ICD-10 C44.590 is a billable code used to indicate a diagnosis of other specified malignant neoplasm of anal skin.

Key Diagnostic Point:

C44.590 refers to a malignant neoplasm located on the skin of the anal region that does not fall under more specific categories of skin cancer. This code encompasses various types of skin malignancies, including squamous cell carcinoma and basal cell carcinoma, that may arise due to factors such as chronic sun exposure, immunosuppression, or HPV infection. The anal skin is particularly susceptible to malignancies due to its unique anatomical and physiological characteristics. 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 local flaps or grafts to restore the integrity of the anal region. Accurate coding requires thorough documentation of the tumor type, size, location, and surgical margins, as well as any reconstructive procedures performed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of skin malignancies that can be coded under this category
  • Need for precise documentation of surgical margins
  • Potential for reconstruction procedures complicating coding
  • Differentiation from other anal and skin cancers

Audit Risk Factors

  • Inadequate documentation of tumor type and characteristics
  • Failure to document surgical margins clearly
  • Misclassification of the neoplasm type
  • Lack of details regarding reconstructive procedures

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the lesion, including size, type, and location, as well as surgical margins and any reconstructive procedures.

Common Clinical Scenarios

Diagnosis and treatment of skin cancers, including excision and reconstruction of malignant lesions.

Billing Considerations

Ensure clear documentation of the type of malignancy and any associated risk factors, such as sun exposure or HPV.

Surgical Oncology

Documentation Requirements

Comprehensive operative reports detailing the excision, margins, and any reconstruction performed.

Common Clinical Scenarios

Surgical removal of anal skin malignancies and subsequent reconstruction.

Billing Considerations

Accurate coding of surgical procedures and clear documentation of margins to support the diagnosis.

Coding Guidelines

Inclusion Criteria

Use C44.590 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the malignancy type, location, and any surgical interventions
  • Include details on margins and reconstruction when applicable
  • specified skin conditions

Exclusion Criteria

Do NOT use C44.590 When
  • Exclude codes for benign neoplasms or non

Related ICD-10 Codes

Related CPT Codes

11646CPT Code

Excision, malignant skin lesion, face, ears, scalp, neck; excised diameter over 4.0 cm

Clinical Scenario

Used when excising a large malignant neoplasm from the anal skin.

Documentation Requirements

Operative report detailing the excised lesion size and margins.

Specialty Considerations

Ensure the procedure is documented in accordance with surgical oncology standards.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of skin malignancies, improving the accuracy of data collection and reimbursement processes. C44.590 provides a distinct code for anal skin malignancies, facilitating better tracking and management of these conditions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin malignancies, improving the accuracy of data collection and reimbursement processes. C44.590 provides a distinct code for anal skin malignancies, facilitating better tracking and management of these conditions.

Reimbursement & Billing Impact

reimbursement processes. C44.590 provides a distinct code for anal skin malignancies, facilitating better tracking and management of these conditions.

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 types of malignancies are included under C44.590?

C44.590 includes various specified malignant neoplasms of the anal skin, such as squamous cell carcinoma and basal cell carcinoma, that do not fall under more specific categories.