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ICD-10 Guide
ICD-10 CodesC44.621

C44.621

Billable

Squamous cell carcinoma of skin of unspecified upper limb, including shoulder

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

Code Description

ICD-10 C44.621 is a billable code used to indicate a diagnosis of squamous cell carcinoma of skin of unspecified upper limb, including shoulder.

Key Diagnostic Point:

Squamous cell carcinoma (SCC) is a common form of skin cancer that arises from the squamous cells in the epidermis. This type of cancer is often associated with prolonged sun exposure, which can lead to DNA damage in skin cells. The upper limb, including the shoulder, is a common site for SCC due to its exposure to ultraviolet (UV) radiation. Patients may present with a variety of symptoms, including a persistent sore that does not heal, a growth that appears crusty or scaly, or a change in an existing mole. Diagnosis is typically confirmed through a biopsy, where a sample of the suspicious skin is examined histologically. Treatment options may include surgical excision, Mohs micrographic surgery, cryotherapy, or topical chemotherapy, depending on the size, depth, and location of the tumor. 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 affected area. Regular follow-up is essential to monitor for recurrence or new skin cancers, especially in patients with a history of sun exposure or previous skin cancers.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation of tumor size and depth
  • Need for precise surgical margin descriptions
  • Differentiation from other skin lesions
  • Potential for multiple lesions requiring coding

Audit Risk Factors

  • Inadequate documentation of tumor characteristics
  • Failure to document surgical margins
  • Misclassification of skin lesions
  • Lack of follow-up documentation

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

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

Common Clinical Scenarios

Diagnosis and treatment of SCC, follow-up for skin cancer surveillance.

Billing Considerations

Ensure accurate documentation of the location and size of lesions, as well as surgical margins.

Oncology

Documentation Requirements

Comprehensive treatment plans, including chemotherapy or radiation therapy details.

Common Clinical Scenarios

Management of advanced SCC, coordination of care with dermatology.

Billing Considerations

Document any systemic treatments and their effects on the patient.

Coding Guidelines

Inclusion Criteria

Use C44.621 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any related conditions
  • Include specific details about the location and characteristics of the carcinoma

Exclusion Criteria

Do NOT use C44.621 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11600CPT Code

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

Clinical Scenario

Used for excision of large SCC lesions on the upper limb.

Documentation Requirements

Document size of lesion, location, and surgical margins.

Specialty Considerations

Dermatologists should ensure clear documentation of the excision site.

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. C44.621 provides detailed information about the location and type of cancer, which is essential for treatment planning and epidemiological studies.

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. C44.621 provides detailed information about the location and type of cancer, which is essential for treatment planning and epidemiological studies.

Reimbursement & Billing Impact

reimbursement processes. C44.621 provides detailed information about the location and type of cancer, which is essential for treatment planning and epidemiological studies.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What are the common treatments for squamous cell carcinoma?

Common treatments include surgical excision, Mohs micrographic surgery, cryotherapy, and topical chemotherapy. The choice of treatment depends on the size, location, and depth of the carcinoma.