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ICD-10 Guide
ICD-10 CodesC44.199

C44.199

Billable

Other specified malignant neoplasm of skin of left eyelid, including canthus

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

Code Description

ICD-10 C44.199 is a billable code used to indicate a diagnosis of other specified malignant neoplasm of skin of left eyelid, including canthus.

Key Diagnostic Point:

C44.199 refers to a malignant neoplasm of the skin located specifically on the left eyelid, including the canthus. This code encompasses various types of skin cancers that may not fit into more specific categories, such as basal cell carcinoma or squamous cell carcinoma. Skin cancers in this area can be influenced by factors such as sun exposure, which is a significant risk factor due to the thin skin and high UV exposure of the eyelids. Surgical intervention often involves excision of the tumor with clear margins to ensure complete removal and minimize recurrence. Reconstruction may be necessary post-excision to restore the eyelid's function and appearance, which can involve complex surgical techniques. Accurate coding is essential for appropriate treatment planning and reimbursement, as well as for tracking the incidence of skin cancers in this sensitive area.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of skin cancer types that can be coded under this category
  • Need for precise documentation of surgical margins
  • Potential for reconstruction procedures post-excision
  • Variability in clinical presentation and treatment approaches

Audit Risk Factors

  • Inadequate documentation of tumor type and size
  • Failure to document surgical margins clearly
  • Misclassification of malignant versus benign lesions
  • Inconsistent coding of reconstruction procedures

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed pathology reports, surgical notes, and follow-up care documentation are essential.

Common Clinical Scenarios

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

Billing Considerations

Ensure accurate coding of both the malignancy and any reconstructive procedures performed.

Ophthalmology

Documentation Requirements

Comprehensive eye examination reports, including visual acuity and eyelid function assessments.

Common Clinical Scenarios

Management of eyelid tumors, including surgical excision and reconstruction.

Billing Considerations

Documentation must clearly indicate the relationship between the eyelid neoplasm and any visual impairment.

Coding Guidelines

Inclusion Criteria

Use C44.199 When
  • According to ICD
  • 10 coding guidelines, C44
  • 199 should be used when a malignant neoplasm of the skin is specified but does not fall under more defined categories
  • Coders must ensure that the documentation supports the diagnosis and that any related procedures are accurately captured

Exclusion Criteria

Do NOT use C44.199 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

17311CPT Code

Mohs micrographic surgery

Clinical Scenario

Used for excision of malignant skin lesions on the eyelid.

Documentation Requirements

Pathology report confirming malignancy and surgical notes detailing margins.

Specialty Considerations

Dermatologists and ophthalmologists must coordinate care for optimal outcomes.

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 those on the eyelids. This specificity aids in better tracking of incidence and treatment outcomes, improving patient care and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin cancers, including those on the eyelids. This specificity aids in better tracking of incidence and treatment outcomes, improving patient care and resource allocation.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Academy of Dermatology
  • •
    American Academy of Ophthalmology

Coding & Billing References

  • •
    American Academy of Dermatology
  • •
    American Academy of Ophthalmology

Frequently Asked Questions

What types of skin cancers are included under C44.199?

C44.199 includes various malignant neoplasms of the skin on the left eyelid, such as basal cell carcinoma, squamous cell carcinoma, and other specified types that do not have a more specific code.

How should surgical margins be documented for C44.199?

Surgical margins should be clearly documented in the operative report, indicating whether they are clear or involved, as this impacts treatment decisions and coding.