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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Infectious And Parasitic Diseases 001-139 > Syphilis And Other Venereal Diseases 090-099 > Early Syphilis Symptomatic 091.* > 2008 ICD-9-CM Diagnosis 091.1 Primary anal syphilis  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 091.1 can be accessed here. 091.1 is a specific code that can be used to specify a diagnosis 091.1 contains 3 index entries View the ICD-9-CM Volume 1 091.* hierarchy Index entries containing 091.1: Induration, indurated chancre 091.0 anus 091.1 Syphilis, syphilitic (acquired) 097.9 anus 095.8 primary 091.1 primary NEC 091.2 anal 091.1