2006 ICD-9-CM Volume 1 Diagnosis Codes > Neoplasms 140-239 > Carcinoma In Situ 230-234 > 230 Carcinoma in situ of digestive organs 231 Carcinoma in situ of respiratory system 232 Carcinoma in situ of skin 233 Carcinoma in situ of breast and genitourinary system 234 Carcinoma in situ of other and unspecified sites