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ICD-10 Guide
ICD-10 CodesC44.291

C44.291

Billable

Other specified malignant neoplasm of skin of unspecified ear and external auricular canal

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

Code Description

ICD-10 C44.291 is a billable code used to indicate a diagnosis of other specified malignant neoplasm of skin of unspecified ear and external auricular canal.

Key Diagnostic Point:

C44.291 refers to a malignant neoplasm of the skin located on the ear or external auricular canal that does not fall into more specific categories of skin cancer. This code encompasses various types of skin malignancies, including squamous cell carcinoma, basal cell carcinoma, and melanoma, that may arise due to factors such as chronic sun exposure, genetic predisposition, or other environmental influences. The ear and external auricular canal are particularly susceptible to skin cancers due to their exposure to ultraviolet (UV) radiation. 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 ear's appearance and function. Accurate coding is essential for proper treatment planning and reimbursement, as well as for tracking cancer incidence and outcomes.

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 tumor type and location
  • Variability in surgical margins and reconstruction techniques
  • Potential for multiple procedures related to treatment

Audit Risk Factors

  • Inadequate documentation of tumor type and characteristics
  • Failure to document surgical margins and reconstruction details
  • Misclassification of benign versus malignant lesions
  • Inconsistent coding practices among different providers

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the lesion, including size, location, and histological type.

Common Clinical Scenarios

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

Billing Considerations

Ensure clear documentation of margins and any reconstructive procedures performed.

Otolaryngology

Documentation Requirements

Comprehensive notes on the surgical approach, including any reconstructive techniques used.

Common Clinical Scenarios

Management of skin cancers affecting the ear and external auditory canal.

Billing Considerations

Document any functional impairments or cosmetic concerns post-surgery.

Coding Guidelines

Inclusion Criteria

Use C44.291 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used only when the malignancy is confirmed through biopsy or other diagnostic means

Exclusion Criteria

Do NOT use C44.291 When
  • Exclude conditions that are not malignant or do not specifically affect the ear or external auricular canal

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Mohs micrographic surgery

Clinical Scenario

Used for excision of skin cancer on the ear with reconstruction.

Documentation Requirements

Document the extent of excision and any reconstructive techniques used.

Specialty Considerations

Dermatologists and otolaryngologists should ensure clear communication regarding surgical details.

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. C44.291 provides a distinct code for malignancies of the ear and external auricular canal, which was less clearly defined in ICD-9.

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. C44.291 provides a distinct code for malignancies of the ear and external auricular canal, which was less clearly defined in ICD-9.

Reimbursement & Billing Impact

reimbursement processes. C44.291 provides a distinct code for malignancies of the ear and external auricular canal, which was less clearly defined in ICD-9.

Resources

Clinical References

  • •
    American Academy of Dermatology
  • •
    National Cancer Institute - Skin Cancer

Coding & Billing References

  • •
    American Academy of Dermatology
  • •
    National Cancer Institute - Skin Cancer

Frequently Asked Questions

What types of skin cancers are included under C44.291?

C44.291 includes various types of malignant skin neoplasms such as squamous cell carcinoma, basal cell carcinoma, and melanoma that are located on the ear or external auricular canal.

How do I ensure accurate coding for surgical procedures related to C44.291?

Accurate coding requires detailed documentation of the surgical procedure, including the type of excision, margins assessed, and any reconstruction performed. Ensure that the diagnosis is clearly linked to the procedure codes.