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ICD-10 Guide
ICD-10 CodesC44.321

C44.321

Billable

Squamous cell carcinoma of skin of nose

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

Code Description

ICD-10 C44.321 is a billable code used to indicate a diagnosis of squamous cell carcinoma of skin of nose.

Key Diagnostic Point:

Squamous cell carcinoma (SCC) of the skin of the nose is a malignant neoplasm that arises from the squamous cells, which are flat cells located in the outer layer of the skin. This type of skin cancer is often associated with prolonged sun exposure, making it more prevalent in individuals with fair skin or those who have spent significant time outdoors without adequate sun protection. Clinically, SCC may present as a persistent sore, a scaly patch, or a growth that may bleed or crust over. Diagnosis typically involves a biopsy to confirm the presence of malignant cells. Treatment options vary based on the size and depth of the tumor and may include surgical excision, Mohs micrographic surgery, or topical chemotherapy. Surgical margins are critical in ensuring complete removal of the cancerous tissue, and reconstruction may be necessary to restore the appearance and function of the nose post-surgery. Follow-up care is essential to monitor for recurrence, as SCC can metastasize if not adequately treated.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation and symptoms of SCC
  • Need for precise documentation of surgical margins
  • Potential for reconstruction procedures post-excision
  • Differentiation from other skin lesions

Audit Risk Factors

  • Inadequate documentation of tumor size and margins
  • Failure to document the type of surgical procedure performed
  • Lack of follow-up documentation for recurrence monitoring
  • Misclassification of the tumor type or location

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the lesion, biopsy results, and treatment plans.

Common Clinical Scenarios

Diagnosis and treatment of skin lesions, including SCC, and management of post-surgical care.

Billing Considerations

Ensure accurate coding of surgical procedures and follow-up care to prevent audit issues.

Plastic Surgery

Documentation Requirements

Comprehensive records of reconstructive procedures and patient consent.

Common Clinical Scenarios

Reconstruction of the nose following excision of SCC and management of cosmetic outcomes.

Billing Considerations

Document the extent of reconstruction and any complications to support coding.

Coding Guidelines

Inclusion Criteria

Use C44.321 When
  • According to ICD
  • 10 coding guidelines, C44
  • 321 should be used when the diagnosis of squamous cell carcinoma is confirmed and specifically located on the nose
  • Coders must ensure that the documentation supports the diagnosis and any associated procedures performed

Exclusion Criteria

Do NOT use C44.321 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Excision, malignant skin lesion

Clinical Scenario

Used when excising SCC from the nose.

Documentation Requirements

Document the size of the lesion and margins excised.

Specialty Considerations

Dermatologists and plastic surgeons should ensure accurate coding based on the complexity of the excision.

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 SCC of the nose, which aids in better tracking of treatment outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, including SCC of the nose, which aids in better tracking of treatment outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of skin cancers, including SCC of the nose, which aids in better tracking of treatment outcomes and resource allocation.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What is the primary cause of squamous cell carcinoma of the skin?

The primary cause is prolonged exposure to ultraviolet (UV) radiation from the sun, which damages the DNA in skin cells, leading to cancerous changes.