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ICD-10 Guide
ICD-10 CodesD04.70

D04.70

Billable

Carcinoma in situ of skin of unspecified lower limb, including hip

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

Code Description

ICD-10 D04.70 is a billable code used to indicate a diagnosis of carcinoma in situ of skin of unspecified lower limb, including hip.

Key Diagnostic Point:

Carcinoma in situ (CIS) of the skin represents a localized form of skin cancer where abnormal cells are present but have not invaded deeper tissues. This specific code, D04.70, pertains to CIS located in the skin of the lower limb, including the hip, but does not specify the exact site. CIS is characterized by the presence of atypical keratinocytes confined to the epidermis, and it is considered a precursor to invasive squamous cell carcinoma. Patients with CIS may present with various skin lesions, including scaly patches, non-healing sores, or changes in existing moles. Surveillance protocols typically involve regular dermatological examinations to monitor for any changes in the lesions, as well as patient education on sun protection and skin self-examinations. The risk of progression to invasive cancer varies, with factors such as lesion size, duration, and patient history influencing the likelihood of progression. Early detection and treatment are crucial to prevent the development of invasive carcinoma.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of lesion characteristics
  • Need for precise localization of lesions
  • Differentiation from other skin conditions
  • Potential for progression to invasive carcinoma

Audit Risk Factors

  • Inadequate documentation of lesion characteristics
  • Failure to document surveillance protocols
  • Misclassification of lesion type
  • Inconsistent follow-up records

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of lesions, treatment plans, and follow-up care.

Common Clinical Scenarios

Diagnosis and management of skin lesions, including biopsies and excisions.

Billing Considerations

Ensure accurate documentation of lesion size, location, and histological findings.

Oncology

Documentation Requirements

Comprehensive treatment plans, including surgical and non-surgical interventions.

Common Clinical Scenarios

Management of patients with skin cancers and monitoring for progression.

Billing Considerations

Documenting patient history and risk factors for skin cancer.

Coding Guidelines

Inclusion Criteria

Use D04.70 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is confirmed by a qualified healthcare provider
  • Include any relevant clinical findings and treatment plans in the documentation

Exclusion Criteria

Do NOT use D04.70 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11100CPT Code

Biopsy of skin, excisional

Clinical Scenario

Used when a biopsy is performed to confirm CIS diagnosis.

Documentation Requirements

Document the site, size, and characteristics of the lesion.

Specialty Considerations

Dermatologists should ensure thorough documentation of the procedure.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of carcinoma in situ, improving the accuracy of data collection and reimbursement processes. D04.70 provides specificity for lower limb lesions, which aids in clinical management and research.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of carcinoma in situ, improving the accuracy of data collection and reimbursement processes. D04.70 provides specificity for lower limb lesions, which aids in clinical management and research.

Reimbursement & Billing Impact

reimbursement processes. D04.70 provides specificity for lower limb lesions, which aids in clinical management and research.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What is carcinoma in situ?

Carcinoma in situ is a localized form of cancer where abnormal cells are present but have not invaded surrounding tissues. It is often considered a precursor to invasive cancer.