D02.4 Carcinoma in situ of respiratory system, unspecified

Billable ICD-10-CM code, FY2026.

Applies from D02 Carcinoma in situ of middle ear and respiratory system

Excludes1 (never code together)

• melanoma in situ (D03.-)

Use additional code

• code to identify:
• exposure to environmental tobacco smoke (Z77.22)
• exposure to tobacco smoke in the perinatal period (P96.81)
• history of tobacco dependence (Z87.891)
• occupational exposure to environmental tobacco smoke (Z57.31)
• tobacco dependence (F17.-)
• tobacco use (Z72.0)

MS-DRG index

Defines the logic of DRG(s) 180-182 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 231.9 Carcinoma in situ of respiratory system, part unspecified

Nearby codes

• D02.2 Carcinoma in situ of bronchus and lung
• D02.20 Carcinoma in situ of unspecified bronchus and lung
• D02.21 Carcinoma in situ of right bronchus and lung
• D02.22 Carcinoma in situ of left bronchus and lung
• D02.3 Carcinoma in situ of other parts of respiratory system
• D02.4 Carcinoma in situ of respiratory system, unspecified (this code)