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ICD-10 Guide
ICD-10 CodesC44.81

C44.81

Billable

Basal cell carcinoma of overlapping sites of skin

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

Code Description

ICD-10 C44.81 is a billable code used to indicate a diagnosis of basal cell carcinoma of overlapping sites of skin.

Key Diagnostic Point:

Basal cell carcinoma (BCC) is the most common form of skin cancer, arising from the basal cells in the epidermis. C44.81 specifically refers to BCC located at overlapping sites of the skin, which can complicate treatment and coding due to the involvement of multiple anatomical areas. This type of cancer is often associated with chronic sun exposure, leading to mutations in the DNA of skin cells. Patients may present with lesions that are pearly or waxy, often with visible blood vessels. Surgical excision is the primary treatment, and careful attention must be paid to surgical margins to ensure complete removal of cancerous tissue. Reconstruction may be necessary depending on the size and location of the excised area, which can further complicate coding. Accurate documentation of the overlapping sites, surgical margins, and any reconstructive procedures is essential for proper coding and billing. The prognosis for BCC is generally favorable, but recurrence can occur, particularly in cases with incomplete excision or in patients with a history of multiple skin cancers.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Multiple overlapping sites complicate documentation.
  • Need for precise surgical margin descriptions.
  • Reconstruction procedures may vary significantly.
  • Differentiation from other skin cancers is required.

Audit Risk Factors

  • Inadequate documentation of overlapping sites.
  • Failure to specify surgical margins.
  • Misclassification of the type of skin cancer.
  • Inconsistent follow-up documentation.

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of lesions, treatment plans, and surgical margins.

Common Clinical Scenarios

Diagnosis and treatment of multiple BCCs, Mohs micrographic surgery.

Billing Considerations

Ensure clear documentation of overlapping sites and any reconstructive efforts.

Oncology

Documentation Requirements

Comprehensive treatment history and follow-up care plans.

Common Clinical Scenarios

Management of recurrent BCC and coordination of care with dermatology.

Billing Considerations

Document any systemic therapies or adjunct treatments used.

Coding Guidelines

Inclusion Criteria

Use C44.81 When
  • According to ICD
  • 10 guidelines, C44
  • 81 should be used when the basal cell carcinoma is documented as affecting overlapping sites of skin
  • Coders must ensure that the documentation supports the diagnosis and includes details about the surgical approach and any reconstructive procedures

Exclusion Criteria

Do NOT use C44.81 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Mohs micrographic surgery

Clinical Scenario

Used for excising BCC with overlapping sites.

Documentation Requirements

Document the extent of the excision and any reconstructive procedures.

Specialty Considerations

Dermatologists must ensure detailed records of margins and reconstruction.

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, including overlapping sites, which enhances the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, including overlapping sites, which enhances the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of skin cancers, including overlapping sites, which enhances the accuracy of patient records and treatment plans.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What is the significance of overlapping sites in basal cell carcinoma?

Overlapping sites indicate that the cancer affects multiple areas of skin, which can complicate treatment and necessitate careful documentation of surgical margins and reconstruction efforts.