Effective Oct 2009 Merkel Cell Carcinoma was assigned to ICD-9-CM category 209. Do you know where it is referenced in the Volume II Alphabetical Index? I cannot find it there. Thank you.
Our ICD-9 (2010 edition with valid codes thru September 30, 2009) has it shown in the alphabetical index under Carcinoma - Merkel Cell. We're currently using the Ingenix 2010 Expert (Page 41 of Volume 2). If it's any help here's a summary of the 4th and 5th digits: