ICD-9-CM Vol. 1 Diagnostic Codes
2. NEOPLASMS (140-239)
section notes
CARCINOMA IN SITU (230-234)
section notes
231 Carcinoma in situ of respiratory system
section notes
231.0   Ca in situ larynx
231.1   Ca in situ trachea
231.2   Ca in situ bronchus/lung
231.8   Ca in situ resp sys NEC
231.9   Ca in situ resp sys NOS
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