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ICD-10 Guide
ICD-10 CodesD04.112

D04.112

Billable

Carcinoma in situ of skin of right lower eyelid, including canthus

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

Code Description

ICD-10 D04.112 is a billable code used to indicate a diagnosis of carcinoma in situ of skin of right lower eyelid, including canthus.

Key Diagnostic Point:

Carcinoma in situ (CIS) of the skin is a non-invasive form of cancer that is confined to the epidermis, the outermost layer of skin. In the case of D04.112, this condition specifically affects the right lower eyelid, including the canthus, which is the corner of the eye where the upper and lower eyelids meet. CIS is characterized by the presence of abnormal cells that have the potential to develop into invasive cancer if left untreated. The right lower eyelid is particularly sensitive due to its thin skin and proximity to the eye, making early detection and treatment crucial. Surveillance protocols typically involve regular dermatological examinations to monitor for changes in the lesion, as well as patient education on self-examination techniques. The risk of progression to invasive carcinoma is present, especially in patients with a history of skin cancer or significant sun exposure. Treatment options may include surgical excision, cryotherapy, or topical chemotherapy, depending on the size and characteristics of the lesion. Regular follow-up is essential to ensure that any recurrence or new lesions are promptly addressed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Specificity of the anatomical location (right lower eyelid)
  • Inclusion of canthus in the description
  • Differentiation from other skin cancers
  • Need for precise documentation of the lesion's characteristics

Audit Risk Factors

  • Inadequate documentation of the lesion's characteristics
  • Failure to document the location accurately
  • Lack of follow-up notes indicating surveillance or treatment
  • Misclassification of the lesion as invasive rather than in situ

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the lesion, including size, color, and any changes over time.

Common Clinical Scenarios

Diagnosis of CIS during routine skin checks, treatment planning for excision.

Billing Considerations

Ensure that all findings are documented in the patient's chart to support the diagnosis and treatment plan.

Ophthalmology

Documentation Requirements

Documentation of ocular health, potential impact on vision, and any surgical interventions performed.

Common Clinical Scenarios

Referral for surgical excision of eyelid lesions, monitoring for ocular complications.

Billing Considerations

Collaboration with dermatology for comprehensive care and documentation of the ocular implications of the lesion.

Coding Guidelines

Inclusion Criteria

Use D04.112 When
  • According to ICD
  • 10 coding guidelines, D04
  • 112 should be used when the carcinoma is confirmed as in situ and specifically located on the right lower eyelid

Exclusion Criteria

Do NOT use D04.112 When
  • Exclusion criteria include any invasive carcinoma or lesions located elsewhere on the body

Related ICD-10 Codes

Related CPT Codes

11420CPT Code

Excision, benign skin lesion

Clinical Scenario

Used when excising a CIS lesion from the right lower eyelid.

Documentation Requirements

Operative report detailing the excision and pathology results.

Specialty Considerations

Dermatology and ophthalmology must coordinate documentation for surgical procedures.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for greater specificity in coding skin cancers, including the ability to distinguish between in situ and invasive lesions, which is crucial for treatment planning and surveillance.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for greater specificity in coding skin cancers, including the ability to distinguish between in situ and invasive lesions, which is crucial for treatment planning and surveillance.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for greater specificity in coding skin cancers, including the ability to distinguish between in situ and invasive lesions, which is crucial for treatment planning and surveillance.

Resources

Clinical References

  • •
    American Academy of Dermatology

Coding & Billing References

  • •
    American Academy of Dermatology

Frequently Asked Questions

What is the significance of coding D04.112 accurately?

Accurate coding of D04.112 is crucial for ensuring appropriate treatment and follow-up care for patients with carcinoma in situ, as it helps in monitoring progression and preventing invasive cancer.