D05.00 Lobular carcinoma in situ of unspecified breast

Billable ICD-10-CM code, FY2026.

Applies from D05 Carcinoma in situ of breast

Excludes1 (never code together)

• carcinoma in situ of skin of breast (D04.5)
• melanoma in situ of breast (skin) (D03.5)
• Paget's disease of breast or nipple (C50.-)

Excludes2 (not included here)

• malignant neoplasm of breast (C50.-)

MS-DRG index

Defines the logic of DRG(s) 582-583 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 233.0 Carcinoma in situ of breast (approximate)

Nearby codes

• D05 Carcinoma in situ of breast
• D05.0 Lobular carcinoma in situ of breast
• D05.00 Lobular carcinoma in situ of unspecified breast (this code)
• D05.01 Lobular carcinoma in situ of right breast
• D05.02 Lobular carcinoma in situ of left breast
• D05.1 Intraductal carcinoma in situ of breast
• D05.10 Intraductal carcinoma in situ of unspecified breast
• D05.11 Intraductal carcinoma in situ of right breast