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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Carcinoma In Situ 230-234 > ICD-9-CM Diagnosis 234 Carcinoma in situ of other and unspecified sites 234 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 234.0 Carcinoma in situ of eye 234.0 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 234.8 Carcinoma in situ of other specified sites 234.8 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 234.9 Carcinoma in situ site unspecified (kar-sin-O-ma in SYE-too) Cancer that involves only the cells in which it began and that has not spread to neighboring tissues. A lesion with cytological characteristics associated with invasive carcinoma but the tumor cells are confined to the epithelium of origin, without invasion of the basement membrane. 234.9 is a specific code that can be used to specify a diagnosis